/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/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:53,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:53,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:53,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:53,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:53,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:53,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:53,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:53,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:53,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:53,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:53,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:53,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:53,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:53,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:53,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:53,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:53,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:53,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:53,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:53,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:53,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:53,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:53,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:53,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:53,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:53,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:53,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:53,666 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 01:29:53,699 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:53,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:53,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:53,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:53,704 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:53,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:53,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:53,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:53,710 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:53,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:53,710 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:53,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:53,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:53,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:53,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:53,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:53,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:53,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:53,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:53,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:53,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:53,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:53,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:53,713 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 01:29:54,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:54,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:54,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:54,022 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:54,022 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:54,023 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-07 01:29:54,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f037ba295/ec3ece5dd9734bc7a84b1f6a4d0a1944/FLAG3bce43783 [2019-11-07 01:29:54,573 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:54,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-07 01:29:54,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f037ba295/ec3ece5dd9734bc7a84b1f6a4d0a1944/FLAG3bce43783 [2019-11-07 01:29:54,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f037ba295/ec3ece5dd9734bc7a84b1f6a4d0a1944 [2019-11-07 01:29:55,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:55,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:55,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:55,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:55,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:55,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:54" (1/1) ... [2019-11-07 01:29:55,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d184af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55, skipping insertion in model container [2019-11-07 01:29:55,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:54" (1/1) ... [2019-11-07 01:29:55,065 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:55,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:55,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:55,314 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:55,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:55,440 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:55,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55 WrapperNode [2019-11-07 01:29:55,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:55,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:55,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:55,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:55,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (1/1) ... [2019-11-07 01:29:55,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:55,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:55,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:55,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:55,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (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 01:29:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:55,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:55,958 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:55,959 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:29:55,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:55 BoogieIcfgContainer [2019-11-07 01:29:55,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:55,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:55,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:55,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:55,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:54" (1/3) ... [2019-11-07 01:29:55,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54704d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:55, skipping insertion in model container [2019-11-07 01:29:55,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:55" (2/3) ... [2019-11-07 01:29:55,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54704d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:55, skipping insertion in model container [2019-11-07 01:29:55,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:55" (3/3) ... [2019-11-07 01:29:55,969 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-11-07 01:29:55,979 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:55,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:56,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:56,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:56,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:56,027 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:56,027 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:56,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:56,027 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:56,028 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:56,028 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:29:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:29:56,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:56,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:56,054 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash 304177849, now seen corresponding path program 1 times [2019-11-07 01:29:56,068 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:56,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287899011] [2019-11-07 01:29:56,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:56,156 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:56,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051269375] [2019-11-07 01:29:56,157 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 01:29:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:56,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:56,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:56,279 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 01:29:56,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:56,312 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 01:29:56,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287899011] [2019-11-07 01:29:56,313 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:56,314 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051269375] [2019-11-07 01:29:56,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:56,315 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:56,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909870625] [2019-11-07 01:29:56,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:56,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:56,339 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:29:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:56,432 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:29:56,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:56,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:29:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:56,443 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:29:56,444 INFO L226 Difference]: Without dead ends: 23 [2019-11-07 01:29:56,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 01:29:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-07 01:29:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-07 01:29:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 01:29:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-07 01:29:56,489 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2019-11-07 01:29:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:56,490 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-07 01:29:56,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-07 01:29:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:29:56,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:56,492 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:56,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:56,696 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 362677943, now seen corresponding path program 1 times [2019-11-07 01:29:56,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:56,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811674713] [2019-11-07 01:29:56,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:56,718 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:56,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402136223] [2019-11-07 01:29:56,719 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 01:29:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:56,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:56,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:56,799 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 01:29:56,799 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:56,822 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 01:29:56,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811674713] [2019-11-07 01:29:56,823 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:56,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402136223] [2019-11-07 01:29:56,823 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:56,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:56,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283903006] [2019-11-07 01:29:56,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:56,826 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:56,827 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 6 states. [2019-11-07 01:29:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:56,930 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2019-11-07 01:29:56,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:56,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:29:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:56,935 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:29:56,935 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 01:29:56,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 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 01:29:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 01:29:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-07 01:29:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 01:29:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2019-11-07 01:29:56,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2019-11-07 01:29:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:56,952 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2019-11-07 01:29:56,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2019-11-07 01:29:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:29:56,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:56,954 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:57,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:57,158 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 421607751, now seen corresponding path program 1 times [2019-11-07 01:29:57,160 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:57,160 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823039481] [2019-11-07 01:29:57,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:57,184 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:57,185 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916543647] [2019-11-07 01:29:57,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:29:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:57,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:57,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:57,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:57,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823039481] [2019-11-07 01:29:57,321 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:57,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916543647] [2019-11-07 01:29:57,322 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:57,322 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:57,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936936245] [2019-11-07 01:29:57,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:57,323 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:57,324 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2019-11-07 01:29:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:57,425 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2019-11-07 01:29:57,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:57,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-07 01:29:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:57,427 INFO L225 Difference]: With dead ends: 77 [2019-11-07 01:29:57,427 INFO L226 Difference]: Without dead ends: 51 [2019-11-07 01:29:57,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 01:29:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-07 01:29:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-07 01:29:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:29:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-11-07 01:29:57,448 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 25 [2019-11-07 01:29:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:57,452 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-11-07 01:29:57,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-11-07 01:29:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:29:57,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:57,454 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:57,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:57,655 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:57,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2016507335, now seen corresponding path program 1 times [2019-11-07 01:29:57,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:57,656 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573704905] [2019-11-07 01:29:57,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:57,667 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:57,667 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124536260] [2019-11-07 01:29:57,668 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 01:29:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:57,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:57,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:29:57,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 01:29:57,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573704905] [2019-11-07 01:29:57,808 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:57,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124536260] [2019-11-07 01:29:57,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070767092] [2019-11-07 01:29:57,832 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:57,832 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:57,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:57,846 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:57,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:58,022 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:58,326 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:59,141 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 01:29:59,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:59,152 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:59,533 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-11-07 01:29:59,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:59,846 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 22 [2019-11-07 01:29:59,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126796722] [2019-11-07 01:29:59,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:29:59,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:29:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:29:59,850 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 22 states. [2019-11-07 01:30:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:01,471 INFO L93 Difference]: Finished difference Result 135 states and 193 transitions. [2019-11-07 01:30:01,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:30:01,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-11-07 01:30:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:01,474 INFO L225 Difference]: With dead ends: 135 [2019-11-07 01:30:01,474 INFO L226 Difference]: Without dead ends: 95 [2019-11-07 01:30:01,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:30:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-07 01:30:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2019-11-07 01:30:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-07 01:30:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2019-11-07 01:30:01,518 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 33 [2019-11-07 01:30:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:01,518 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2019-11-07 01:30:01,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:30:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2019-11-07 01:30:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 01:30:01,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:01,520 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:01,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:01,732 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash -130175289, now seen corresponding path program 2 times [2019-11-07 01:30:01,733 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:01,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037602885] [2019-11-07 01:30:01,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:01,742 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:01,742 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008758946] [2019-11-07 01:30:01,742 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 01:30:02,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-07 01:30:02,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:02,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:30:02,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-07 01:30:02,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-07 01:30:02,219 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037602885] [2019-11-07 01:30:02,220 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:02,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008758946] [2019-11-07 01:30:02,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148005115] [2019-11-07 01:30:02,222 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:02,222 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:02,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:02,223 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:02,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:02,257 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:02,342 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:03,062 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 01:30:03,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:03,076 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:03,403 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-11-07 01:30:03,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:03,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 30 [2019-11-07 01:30:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436374076] [2019-11-07 01:30:03,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-07 01:30:03,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-07 01:30:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:30:03,702 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 30 states. [2019-11-07 01:30:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:06,165 INFO L93 Difference]: Finished difference Result 251 states and 357 transitions. [2019-11-07 01:30:06,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 01:30:06,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2019-11-07 01:30:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:06,173 INFO L225 Difference]: With dead ends: 251 [2019-11-07 01:30:06,173 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:30:06,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2019-11-07 01:30:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:30:06,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2019-11-07 01:30:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-07 01:30:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 207 transitions. [2019-11-07 01:30:06,232 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 207 transitions. Word has length 49 [2019-11-07 01:30:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:06,233 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 207 transitions. [2019-11-07 01:30:06,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-07 01:30:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 207 transitions. [2019-11-07 01:30:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-07 01:30:06,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:06,238 INFO L410 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:06,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:06,443 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1937432377, now seen corresponding path program 3 times [2019-11-07 01:30:06,445 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:06,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834131373] [2019-11-07 01:30:06,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:06,483 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:06,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549230990] [2019-11-07 01:30:06,483 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 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 [2019-11-07 01:30:06,603 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:30:06,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:06,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-07 01:30:06,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-07 01:30:06,968 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-07 01:30:07,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834131373] [2019-11-07 01:30:07,320 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:07,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549230990] [2019-11-07 01:30:07,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235061034] [2019-11-07 01:30:07,322 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:07,322 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:07,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:07,323 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:07,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:07,359 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:07,433 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:07,922 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 01:30:07,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:07,934 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:08,399 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-11-07 01:30:08,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:08,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 12] total 50 [2019-11-07 01:30:08,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924231673] [2019-11-07 01:30:08,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-07 01:30:08,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-07 01:30:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1872, Unknown=0, NotChecked=0, Total=2450 [2019-11-07 01:30:08,854 INFO L87 Difference]: Start difference. First operand 170 states and 207 transitions. Second operand 50 states. [2019-11-07 01:30:13,131 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-11-07 01:30:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:15,762 INFO L93 Difference]: Finished difference Result 686 states and 858 transitions. [2019-11-07 01:30:15,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-07 01:30:15,763 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2019-11-07 01:30:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:15,769 INFO L225 Difference]: With dead ends: 686 [2019-11-07 01:30:15,769 INFO L226 Difference]: Without dead ends: 555 [2019-11-07 01:30:15,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2688, Invalid=8024, Unknown=0, NotChecked=0, Total=10712 [2019-11-07 01:30:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2019-11-07 01:30:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 550. [2019-11-07 01:30:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2019-11-07 01:30:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 672 transitions. [2019-11-07 01:30:15,872 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 672 transitions. Word has length 81 [2019-11-07 01:30:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:15,873 INFO L462 AbstractCegarLoop]: Abstraction has 550 states and 672 transitions. [2019-11-07 01:30:15,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-07 01:30:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 672 transitions. [2019-11-07 01:30:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-07 01:30:15,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:15,879 INFO L410 BasicCegarLoop]: trace histogram [196, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:16,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:16,083 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1331474927, now seen corresponding path program 4 times [2019-11-07 01:30:16,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:16,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642286417] [2019-11-07 01:30:16,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:16,103 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:16,104 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343382282] [2019-11-07 01:30:16,104 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 01:30:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:16,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-07 01:30:16,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-11-07 01:30:16,647 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-11-07 01:30:17,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642286417] [2019-11-07 01:30:17,102 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:17,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343382282] [2019-11-07 01:30:17,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423471148] [2019-11-07 01:30:17,106 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:17,107 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:17,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:17,108 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:17,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:17,136 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:17,209 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:17,731 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 01:30:17,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:17,743 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:18,078 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-11-07 01:30:18,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:18,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 46 [2019-11-07 01:30:18,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023236177] [2019-11-07 01:30:18,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-07 01:30:18,418 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-07 01:30:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=1429, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:30:18,419 INFO L87 Difference]: Start difference. First operand 550 states and 672 transitions. Second operand 46 states. [2019-11-07 01:30:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:22,893 INFO L93 Difference]: Finished difference Result 1643 states and 2335 transitions. [2019-11-07 01:30:22,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-07 01:30:22,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2019-11-07 01:30:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:22,903 INFO L225 Difference]: With dead ends: 1643 [2019-11-07 01:30:22,903 INFO L226 Difference]: Without dead ends: 1115 [2019-11-07 01:30:22,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 676 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2090, Invalid=5220, Unknown=0, NotChecked=0, Total=7310 [2019-11-07 01:30:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-11-07 01:30:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1110. [2019-11-07 01:30:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2019-11-07 01:30:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1344 transitions. [2019-11-07 01:30:23,066 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1344 transitions. Word has length 241 [2019-11-07 01:30:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:23,066 INFO L462 AbstractCegarLoop]: Abstraction has 1110 states and 1344 transitions. [2019-11-07 01:30:23,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-07 01:30:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1344 transitions. [2019-11-07 01:30:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2019-11-07 01:30:23,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:23,081 INFO L410 BasicCegarLoop]: trace histogram [420, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:23,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:23,295 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -148070417, now seen corresponding path program 5 times [2019-11-07 01:30:23,296 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:23,296 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048325186] [2019-11-07 01:30:23,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:23,321 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:23,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558894047] [2019-11-07 01:30:23,322 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 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