/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-tiling/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:32:20,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:32:20,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:32:20,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:32:20,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:32:20,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:32:20,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:32:20,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:32:20,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:32:20,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:32:20,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:32:20,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:32:20,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:32:20,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:32:20,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:32:20,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:32:20,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:32:20,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:32:20,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:32:20,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:32:20,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:32:20,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:32:20,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:32:20,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:32:20,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:32:20,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:32:20,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:32:20,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:32:20,891 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 01:32:20,911 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:32:20,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:32:20,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:32:20,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:32:20,913 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:32:20,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:32:20,914 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:32:20,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:32:20,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:32:20,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:32:20,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:32:20,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:32:20,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:32:20,917 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:32:20,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:32:20,917 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:32:20,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:32:20,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:32:20,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:32:20,918 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:32:20,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:32:20,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:32:20,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:32:20,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:32:20,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:32:20,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:32:20,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:32:20,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:32:20,920 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 01:32:21,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:32:21,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:32:21,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:32:21,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:32:21,251 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:32:21,251 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2019-11-07 01:32:21,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f150fa8/19de7e92e48b44b69ceead97d619e5c5/FLAG0a6b3b24b [2019-11-07 01:32:21,729 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:32:21,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2019-11-07 01:32:21,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f150fa8/19de7e92e48b44b69ceead97d619e5c5/FLAG0a6b3b24b [2019-11-07 01:32:22,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f150fa8/19de7e92e48b44b69ceead97d619e5c5 [2019-11-07 01:32:22,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:32:22,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:32:22,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:22,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:32:22,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:32:22,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183b6ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22, skipping insertion in model container [2019-11-07 01:32:22,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:32:22,186 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:32:22,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:22,443 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:32:22,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:32:22,485 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:32:22,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22 WrapperNode [2019-11-07 01:32:22,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:32:22,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:32:22,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:32:22,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:32:22,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (1/1) ... [2019-11-07 01:32:22,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:32:22,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:32:22,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:32:22,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:32:22,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (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 01:32:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:32:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:32:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:32:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 01:32:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:32:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:32:22,990 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:32:22,990 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:32:22,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:22 BoogieIcfgContainer [2019-11-07 01:32:22,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:32:22,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:32:22,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:32:22,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:32:22,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:22" (1/3) ... [2019-11-07 01:32:22,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575faf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:22, skipping insertion in model container [2019-11-07 01:32:22,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:22" (2/3) ... [2019-11-07 01:32:22,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575faf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:22, skipping insertion in model container [2019-11-07 01:32:22,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:22" (3/3) ... [2019-11-07 01:32:22,999 INFO L109 eAbstractionObserver]: Analyzing ICFG poly1.c [2019-11-07 01:32:23,009 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:32:23,016 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:32:23,026 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:32:23,048 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:32:23,049 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:32:23,049 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:32:23,049 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:32:23,049 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:32:23,049 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:32:23,049 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:32:23,049 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:32:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:32:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:32:23,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:23,073 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:23,075 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1458036132, now seen corresponding path program 1 times [2019-11-07 01:32:23,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:23,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993965145] [2019-11-07 01:32:23,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:23,188 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:32:23,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508820189] [2019-11-07 01:32:23,189 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 01:32:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:23,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:32:23,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:23,324 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 01:32:23,324 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:23,347 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 01:32:23,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993965145] [2019-11-07 01:32:23,348 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:32:23,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508820189] [2019-11-07 01:32:23,349 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:32:23,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:32:23,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830414850] [2019-11-07 01:32:23,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:32:23,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:23,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:32:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:32:23,378 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2019-11-07 01:32:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:23,454 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-11-07 01:32:23,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:32:23,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-07 01:32:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:23,467 INFO L225 Difference]: With dead ends: 35 [2019-11-07 01:32:23,467 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:32:23,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 01:32:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:32:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:32:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:32:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-07 01:32:23,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2019-11-07 01:32:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:23,519 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-07 01:32:23,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:32:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-07 01:32:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:32:23,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:23,521 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:23,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:23,727 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1807623524, now seen corresponding path program 1 times [2019-11-07 01:32:23,729 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:23,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451840069] [2019-11-07 01:32:23,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:23,762 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:32:23,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141260154] [2019-11-07 01:32:23,766 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 01:32:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:23,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 01:32:23,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:23,908 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:23,909 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:23,931 INFO L567 ElimStorePlain]: treesize reduction 7, result has 80.6 percent of original size [2019-11-07 01:32:23,946 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2019-11-07 01:32:23,946 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:23,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:23,959 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:23,959 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:25 [2019-11-07 01:32:23,996 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-07 01:32:23,997 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-07 01:32:23,998 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,004 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:24,005 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,005 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-07 01:32:24,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:24,056 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:24,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,101 INFO L341 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2019-11-07 01:32:24,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2019-11-07 01:32:24,105 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,122 INFO L567 ElimStorePlain]: treesize reduction 32, result has 17.9 percent of original size [2019-11-07 01:32:24,123 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:24,123 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-11-07 01:32:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:32:24,174 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:25,674 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2019-11-07 01:32:25,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,698 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2019-11-07 01:32:25,720 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 226 [2019-11-07 01:32:25,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:25,724 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-07 01:32:35,099 WARN L191 SmtUtils]: Spent 9.37 s on a formula simplification. DAG size of input: 38 DAG size of output: 11 [2019-11-07 01:32:35,100 INFO L567 ElimStorePlain]: treesize reduction 214, result has 6.6 percent of original size [2019-11-07 01:32:35,101 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:39,154 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-07 01:32:39,154 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:39,166 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2019-11-07 01:32:39,182 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 218 [2019-11-07 01:32:39,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:32:39,190 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-07 01:32:48,085 WARN L191 SmtUtils]: Spent 8.89 s on a formula simplification. DAG size of input: 47 DAG size of output: 10 [2019-11-07 01:32:48,085 INFO L567 ElimStorePlain]: treesize reduction 373, result has 3.1 percent of original size [2019-11-07 01:32:48,086 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-07 01:32:49,737 WARN L191 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 16 [2019-11-07 01:32:49,738 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-07 01:32:49,738 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-07 01:32:49,739 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:85, output treesize:28 [2019-11-07 01:32:52,148 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~i~0 4294967296))) (and (or (= 0 (let ((.cse0 (+ c_main_~i~0 1))) (* .cse0 .cse0))) (<= .cse1 2147483647)) (or (= 0 (* c_main_~i~0 c_main_~i~0)) (< 2147483647 .cse1)))) is different from true [2019-11-07 01:32:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2019-11-07 01:32:52,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451840069] [2019-11-07 01:32:52,156 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:32:52,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141260154] [2019-11-07 01:32:52,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567962303] [2019-11-07 01:32:52,179 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:32:52,179 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:52,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:52,192 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:52,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:52,326 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:52,558 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:52,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2019-11-07 01:32:52,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:52,600 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:53,839 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:32:53,839 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 27 [2019-11-07 01:32:53,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10397536] [2019-11-07 01:32:53,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 01:32:53,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:32:53,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 01:32:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=558, Unknown=17, NotChecked=48, Total=702 [2019-11-07 01:32:53,845 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 27 states. [2019-11-07 01:32:57,150 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-07 01:32:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:32:57,970 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-07 01:32:57,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:32:57,971 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2019-11-07 01:32:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:32:57,973 INFO L225 Difference]: With dead ends: 31 [2019-11-07 01:32:57,973 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:32:57,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=177, Invalid=1136, Unknown=23, NotChecked=70, Total=1406 [2019-11-07 01:32:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:32:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-07 01:32:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:32:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-07 01:32:57,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2019-11-07 01:32:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:32:57,989 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-07 01:32:57,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 01:32:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-07 01:32:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:32:57,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:32:57,992 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:32:58,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:32:58,195 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:32:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:32:58,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2041914692, now seen corresponding path program 1 times [2019-11-07 01:32:58,196 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:32:58,196 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238076518] [2019-11-07 01:32:58,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:32:58,214 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:32:58,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714026057] [2019-11-07 01:32:58,215 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 01:32:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:32:58,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 01:32:58,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:32:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:32:58,356 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:32:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:32:58,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238076518] [2019-11-07 01:32:58,408 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:32:58,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714026057] [2019-11-07 01:32:58,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456246443] [2019-11-07 01:32:58,410 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:32:58,410 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:32:58,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:32:58,411 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:32:58,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:32:58,446 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-11-07 01:32:58,496 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:58,501 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:58,595 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:32:58,965 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 108 for LOIs [2019-11-07 01:32:58,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-11-07 01:32:58,983 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:32:59,739 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-11-07 01:33:00,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:33:00,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 12] total 24 [2019-11-07 01:33:00,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022887375] [2019-11-07 01:33:00,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:33:00,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:33:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:33:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:33:00,266 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 24 states. [2019-11-07 01:33:04,585 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-11-07 01:33:05,271 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-11-07 01:33:08,020 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2019-11-07 01:33:08,247 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-11-07 01:33:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:33:08,248 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-11-07 01:33:08,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 01:33:08,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-11-07 01:33:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:33:08,249 INFO L225 Difference]: With dead ends: 52 [2019-11-07 01:33:08,250 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:33:08,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=338, Invalid=2012, Unknown=2, NotChecked=0, Total=2352 [2019-11-07 01:33:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:33:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-07 01:33:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:33:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-07 01:33:08,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 28 [2019-11-07 01:33:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:33:08,261 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-07 01:33:08,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:33:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-07 01:33:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:33:08,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:33:08,262 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:33:08,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:33:08,466 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:33:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:33:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465666, now seen corresponding path program 2 times [2019-11-07 01:33:08,467 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:33:08,467 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324137390] [2019-11-07 01:33:08,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:33:08,504 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:33:08,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346882693] [2019-11-07 01:33:08,505 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 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