/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-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:42,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:42,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:42,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:42,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:42,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:42,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:42,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:42,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:42,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:42,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:42,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:42,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:42,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:42,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:42,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:42,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:42,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:42,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:42,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:42,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:42,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:42,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:42,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:42,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:42,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:42,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:42,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:42,887 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 01:29:42,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:42,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:42,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:42,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:42,902 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:42,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:42,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:42,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:42,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:42,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:42,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:42,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:42,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:42,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:42,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:42,905 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:42,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:42,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:42,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:42,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:42,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:42,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:42,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:42,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:42,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:42,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:42,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:42,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:42,907 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 01:29:43,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:43,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:43,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:43,205 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:43,205 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:43,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-07 01:29:43,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb6fdfc3/93659c02ba4d4b1e884b4ec440d84d23/FLAG22e23f257 [2019-11-07 01:29:43,743 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:43,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-07 01:29:43,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb6fdfc3/93659c02ba4d4b1e884b4ec440d84d23/FLAG22e23f257 [2019-11-07 01:29:44,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adb6fdfc3/93659c02ba4d4b1e884b4ec440d84d23 [2019-11-07 01:29:44,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:44,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:44,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:44,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:44,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:44,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aee848c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44, skipping insertion in model container [2019-11-07 01:29:44,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:44,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:44,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:44,397 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:44,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:44,539 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:44,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44 WrapperNode [2019-11-07 01:29:44,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:44,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:44,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:44,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:44,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (1/1) ... [2019-11-07 01:29:44,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:44,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:44,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:44,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:44,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (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 01:29:44,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:44,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:44,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:44,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:44,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:44,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:44,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:44,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:44,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:45,158 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:45,159 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-07 01:29:45,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:45 BoogieIcfgContainer [2019-11-07 01:29:45,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:45,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:45,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:45,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:45,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:44" (1/3) ... [2019-11-07 01:29:45,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5d46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:45, skipping insertion in model container [2019-11-07 01:29:45,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:44" (2/3) ... [2019-11-07 01:29:45,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5d46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:45, skipping insertion in model container [2019-11-07 01:29:45,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:45" (3/3) ... [2019-11-07 01:29:45,171 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2019-11-07 01:29:45,181 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:45,191 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:45,202 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:45,225 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:45,225 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:45,225 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:45,225 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:45,226 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:45,226 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:45,226 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:45,226 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-07 01:29:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:29:45,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:45,248 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:45,251 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash -56735169, now seen corresponding path program 1 times [2019-11-07 01:29:45,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:45,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443024144] [2019-11-07 01:29:45,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:45,345 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:45,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17996335] [2019-11-07 01:29:45,346 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 01:29:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:45,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:45,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:45,468 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 01:29:45,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:45,494 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 01:29:45,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443024144] [2019-11-07 01:29:45,495 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:45,495 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17996335] [2019-11-07 01:29:45,496 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:45,496 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:45,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775072726] [2019-11-07 01:29:45,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:45,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:45,523 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-11-07 01:29:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:45,614 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-07 01:29:45,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:45,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:29:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:45,626 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:29:45,627 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:29:45,631 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 01:29:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:29:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:29:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:29:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-07 01:29:45,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-11-07 01:29:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:45,678 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-07 01:29:45,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-07 01:29:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:29:45,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:45,679 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:45,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:45,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2078702025, now seen corresponding path program 1 times [2019-11-07 01:29:45,885 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:45,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555994178] [2019-11-07 01:29:45,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:45,898 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:45,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335501041] [2019-11-07 01:29:45,899 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 01:29:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:45,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:45,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:45,978 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 01:29:45,978 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:46,010 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 01:29:46,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555994178] [2019-11-07 01:29:46,011 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:46,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335501041] [2019-11-07 01:29:46,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:46,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418919449] [2019-11-07 01:29:46,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:46,014 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:46,015 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-11-07 01:29:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:46,168 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-11-07 01:29:46,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:46,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:29:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:46,173 INFO L225 Difference]: With dead ends: 60 [2019-11-07 01:29:46,174 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 01:29:46,175 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 01:29:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 01:29:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-07 01:29:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:29:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-11-07 01:29:46,190 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-11-07 01:29:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:46,191 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-11-07 01:29:46,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-11-07 01:29:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:29:46,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:46,193 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:46,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:46,397 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1575875141, now seen corresponding path program 1 times [2019-11-07 01:29:46,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:46,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48892505] [2019-11-07 01:29:46,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:46,430 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:46,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722464389] [2019-11-07 01:29:46,431 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 01:29:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:46,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:46,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:46,520 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 01:29:46,520 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:46,551 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 01:29:46,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48892505] [2019-11-07 01:29:46,552 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:46,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722464389] [2019-11-07 01:29:46,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:46,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:46,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007891559] [2019-11-07 01:29:46,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:46,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:46,555 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-11-07 01:29:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:46,668 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-11-07 01:29:46,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:46,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-07 01:29:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:46,672 INFO L225 Difference]: With dead ends: 94 [2019-11-07 01:29:46,672 INFO L226 Difference]: Without dead ends: 62 [2019-11-07 01:29:46,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 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 01:29:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-07 01:29:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-07 01:29:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:29:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-11-07 01:29:46,703 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-11-07 01:29:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:46,703 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-11-07 01:29:46,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-11-07 01:29:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:29:46,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:46,706 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:46,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:46,913 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1632263227, now seen corresponding path program 1 times [2019-11-07 01:29:46,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:46,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130787537] [2019-11-07 01:29:46,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:46,925 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:46,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398451594] [2019-11-07 01:29:46,926 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 01:29:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:47,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:47,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:47,046 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 01:29:47,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:47,082 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 01:29:47,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130787537] [2019-11-07 01:29:47,083 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:47,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398451594] [2019-11-07 01:29:47,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264648457] [2019-11-07 01:29:47,112 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:29:47,113 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:47,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:47,126 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:47,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:47,299 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:48,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:48,203 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:48,417 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:48,417 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:48,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964747809] [2019-11-07 01:29:48,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:48,419 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:48,421 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-11-07 01:29:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:48,923 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-11-07 01:29:48,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:48,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-07 01:29:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:48,925 INFO L225 Difference]: With dead ends: 93 [2019-11-07 01:29:48,925 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:29:48,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:29:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-11-07 01:29:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-07 01:29:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-11-07 01:29:48,943 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-11-07 01:29:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:48,944 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-11-07 01:29:48,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-11-07 01:29:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-07 01:29:48,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:48,945 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:49,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:49,157 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2005353240, now seen corresponding path program 1 times [2019-11-07 01:29:49,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:49,158 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578677073] [2019-11-07 01:29:49,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:49,166 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:49,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085130915] [2019-11-07 01:29:49,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:49,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:49,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:29:49,273 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:29:49,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578677073] [2019-11-07 01:29:49,319 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:49,319 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085130915] [2019-11-07 01:29:49,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616896769] [2019-11-07 01:29:49,322 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:29:49,322 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:49,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:49,323 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:49,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:49,355 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:49,953 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-11-07 01:29:50,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-11-07 01:29:50,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:50,819 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:53,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:53,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-11-07 01:29:53,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301553474] [2019-11-07 01:29:53,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-07 01:29:53,581 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-07 01:29:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=549, Unknown=1, NotChecked=0, Total=650 [2019-11-07 01:29:53,582 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-11-07 01:30:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:06,152 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-11-07 01:30:06,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:30:06,153 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-11-07 01:30:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:06,155 INFO L225 Difference]: With dead ends: 173 [2019-11-07 01:30:06,155 INFO L226 Difference]: Without dead ends: 122 [2019-11-07 01:30:06,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=394, Invalid=1496, Unknown=2, NotChecked=0, Total=1892 [2019-11-07 01:30:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-07 01:30:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2019-11-07 01:30:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-07 01:30:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-11-07 01:30:06,181 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 44 [2019-11-07 01:30:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:06,181 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-11-07 01:30:06,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-07 01:30:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-11-07 01:30:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-07 01:30:06,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:06,184 INFO L410 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:06,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:06,388 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash 273005720, now seen corresponding path program 2 times [2019-11-07 01:30:06,389 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:06,389 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955781780] [2019-11-07 01:30:06,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:06,431 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:06,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126400285] [2019-11-07 01:30:06,431 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 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 01:30:06,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:30:06,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:06,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:30:06,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:30:06,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-11-07 01:30:06,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955781780] [2019-11-07 01:30:06,606 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:06,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126400285] [2019-11-07 01:30:06,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112603618] [2019-11-07 01:30:06,608 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:30:06,608 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:06,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:06,609 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:06,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:06,627 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:07,801 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-11-07 01:30:07,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:07,818 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:10,670 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:10,670 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-11-07 01:30:10,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583534199] [2019-11-07 01:30:10,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:30:10,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:30:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-11-07 01:30:10,673 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand 24 states. [2019-11-07 01:30:11,129 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-07 01:30:11,271 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2019-11-07 01:30:11,483 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-11-07 01:30:11,627 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2019-11-07 01:30:11,832 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-11-07 01:30:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:25,749 INFO L93 Difference]: Finished difference Result 407 states and 515 transitions. [2019-11-07 01:30:25,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-07 01:30:25,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-11-07 01:30:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:25,752 INFO L225 Difference]: With dead ends: 407 [2019-11-07 01:30:25,753 INFO L226 Difference]: Without dead ends: 332 [2019-11-07 01:30:25,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=386, Invalid=1418, Unknown=2, NotChecked=0, Total=1806 [2019-11-07 01:30:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-11-07 01:30:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 207. [2019-11-07 01:30:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-07 01:30:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2019-11-07 01:30:25,818 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 68 [2019-11-07 01:30:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:25,819 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2019-11-07 01:30:25,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:30:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2019-11-07 01:30:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:30:25,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:25,822 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:26,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:26,029 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash -414458837, now seen corresponding path program 3 times [2019-11-07 01:30:26,029 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:26,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854695056] [2019-11-07 01:30:26,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:26,043 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:26,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216648047] [2019-11-07 01:30:26,044 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 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