/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:29:16,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:29:16,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:29:16,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:29:16,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:29:16,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:29:16,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:29:16,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:29:16,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:29:16,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:29:16,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:29:16,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:29:16,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:29:16,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:29:16,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:29:16,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:29:16,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:29:16,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:29:16,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:29:16,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:29:16,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:29:16,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:29:16,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:29:16,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:29:16,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:29:16,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:29:16,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:29:16,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:29:16,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:29:16,956 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:29:16,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:29:16,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:29:16,957 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:29:16,957 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:29:16,958 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:29:16,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:29:16,958 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:29:16,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:29:16,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:29:16,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:29:16,959 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:29:16,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:29:16,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:29:16,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:29:16,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:29:16,960 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:29:16,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:29:16,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:29:16,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:29:16,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:29:16,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:29:16,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:29:16,962 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:29:16,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:29:16,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:29:16,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:29:16,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:29:16,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:29:16,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:29:16,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:29:16,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:29:16,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:29:16,964 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:29:16,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:29:16,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:29:16,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:29:16,965 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:29:17,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:29:17,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:29:17,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:29:17,258 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:29:17,258 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:29:17,259 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-11-24 04:29:17,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a9957da/620dfa57666c4baa91787fcbbda919b4/FLAG9be1c5e81 [2019-11-24 04:29:17,793 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:29:17,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-11-24 04:29:17,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a9957da/620dfa57666c4baa91787fcbbda919b4/FLAG9be1c5e81 [2019-11-24 04:29:18,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a9957da/620dfa57666c4baa91787fcbbda919b4 [2019-11-24 04:29:18,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:29:18,184 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:29:18,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:29:18,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:29:18,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:29:18,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b03bd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18, skipping insertion in model container [2019-11-24 04:29:18,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:29:18,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:29:18,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:29:18,412 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:29:18,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:29:18,449 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:29:18,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18 WrapperNode [2019-11-24 04:29:18,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:29:18,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:29:18,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:29:18,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:29:18,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:29:18,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:29:18,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:29:18,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:29:18,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (1/1) ... [2019-11-24 04:29:18,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:29:18,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:29:18,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:29:18,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:29:18,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (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 [2019-11-24 04:29:18,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:29:18,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:29:18,990 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:29:18,990 INFO L284 CfgBuilder]: Removed 19 assume(true) statements. [2019-11-24 04:29:18,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:29:18 BoogieIcfgContainer [2019-11-24 04:29:18,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:29:18,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:29:18,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:29:18,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:29:18,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:29:18" (1/3) ... [2019-11-24 04:29:18,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4abb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:29:18, skipping insertion in model container [2019-11-24 04:29:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:29:18" (2/3) ... [2019-11-24 04:29:18,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4abb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:29:18, skipping insertion in model container [2019-11-24 04:29:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:29:18" (3/3) ... [2019-11-24 04:29:18,998 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-11-24 04:29:19,005 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:29:19,012 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-24 04:29:19,022 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-24 04:29:19,049 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:29:19,049 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:29:19,050 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:29:19,050 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:29:19,050 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:29:19,050 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:29:19,050 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:29:19,050 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:29:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-24 04:29:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:29:19,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:19,072 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:29:19,072 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-24 04:29:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:19,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650247782] [2019-11-24 04:29:19,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:19,175 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:19,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252895378] [2019-11-24 04:29:19,176 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 [2019-11-24 04:29:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:19,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:29:19,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:19,303 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:19,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650247782] [2019-11-24 04:29:19,351 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:19,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252895378] [2019-11-24 04:29:19,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:19,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:29:19,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782042245] [2019-11-24 04:29:19,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:29:19,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:29:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:29:19,377 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2019-11-24 04:29:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:19,605 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2019-11-24 04:29:19,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:29:19,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-11-24 04:29:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:19,618 INFO L225 Difference]: With dead ends: 90 [2019-11-24 04:29:19,619 INFO L226 Difference]: Without dead ends: 55 [2019-11-24 04:29:19,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:29:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-24 04:29:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2019-11-24 04:29:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-24 04:29:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-24 04:29:19,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 4 [2019-11-24 04:29:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:19,667 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-24 04:29:19,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:29:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-24 04:29:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:29:19,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:19,669 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:29:19,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:19,873 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-24 04:29:19,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:19,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445692529] [2019-11-24 04:29:19,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:19,884 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:19,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396859857] [2019-11-24 04:29:19,884 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) [2019-11-24 04:29:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:19,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:29:19,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:19,952 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:19,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445692529] [2019-11-24 04:29:19,978 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:19,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396859857] [2019-11-24 04:29:19,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:19,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:29:19,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561584244] [2019-11-24 04:29:19,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:29:19,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:19,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:29:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:29:19,982 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 6 states. [2019-11-24 04:29:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:20,149 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-24 04:29:20,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:29:20,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-24 04:29:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:20,151 INFO L225 Difference]: With dead ends: 55 [2019-11-24 04:29:20,151 INFO L226 Difference]: Without dead ends: 53 [2019-11-24 04:29:20,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:29:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-24 04:29:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2019-11-24 04:29:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-24 04:29:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-24 04:29:20,174 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 6 [2019-11-24 04:29:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:20,177 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-24 04:29:20,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:29:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-24 04:29:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:29:20,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:20,179 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:20,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:20,383 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-11-24 04:29:20,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:20,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758361395] [2019-11-24 04:29:20,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:20,392 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:20,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831294661] [2019-11-24 04:29:20,393 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 [2019-11-24 04:29:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:20,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:29:20,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:20,453 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:20,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758361395] [2019-11-24 04:29:20,487 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:20,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831294661] [2019-11-24 04:29:20,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:20,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-24 04:29:20,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412453794] [2019-11-24 04:29:20,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:29:20,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:29:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:29:20,489 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 6 states. [2019-11-24 04:29:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:20,632 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-24 04:29:20,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:29:20,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-24 04:29:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:20,634 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:29:20,634 INFO L226 Difference]: Without dead ends: 46 [2019-11-24 04:29:20,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:29:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-24 04:29:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-11-24 04:29:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-24 04:29:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-24 04:29:20,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 8 [2019-11-24 04:29:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:20,650 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-24 04:29:20,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:29:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-24 04:29:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:29:20,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:20,652 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:20,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:20,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1354106950, now seen corresponding path program 1 times [2019-11-24 04:29:20,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:20,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374056497] [2019-11-24 04:29:20,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:20,861 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:20,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811626221] [2019-11-24 04:29:20,861 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) [2019-11-24 04:29:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:20,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-24 04:29:20,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:20,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:20,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374056497] [2019-11-24 04:29:20,909 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:20,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811626221] [2019-11-24 04:29:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:29:20,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-24 04:29:20,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362690899] [2019-11-24 04:29:20,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:29:20,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:20,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:29:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:29:20,911 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 5 states. [2019-11-24 04:29:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:20,974 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-24 04:29:20,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:29:20,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-24 04:29:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:20,975 INFO L225 Difference]: With dead ends: 41 [2019-11-24 04:29:20,976 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 04:29:20,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:29:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 04:29:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 04:29:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 04:29:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-24 04:29:20,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 11 [2019-11-24 04:29:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:20,983 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-24 04:29:20,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:29:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-24 04:29:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:29:20,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:20,984 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:21,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:21,188 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1355966903, now seen corresponding path program 1 times [2019-11-24 04:29:21,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:21,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134530608] [2019-11-24 04:29:21,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:21,211 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:29:21,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810004205] [2019-11-24 04:29:21,211 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 [2019-11-24 04:29:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:21,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-24 04:29:21,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:21,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:29:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:29:21,329 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:21,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:29:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:29:21,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134530608] [2019-11-24 04:29:21,370 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:29:21,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810004205] [2019-11-24 04:29:21,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365588597] [2019-11-24 04:29:21,394 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:29:21,394 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:29:21,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:29:21,408 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:29:21,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:29:22,017 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-11-24 04:29:22,173 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 239 [2019-11-24 04:29:22,577 WARN L192 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 521 [2019-11-24 04:29:23,057 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 522 [2019-11-24 04:29:24,094 WARN L192 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 1173 [2019-11-24 04:29:25,478 WARN L192 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 1170 DAG size of output: 1170 [2019-11-24 04:29:31,063 WARN L192 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 2941 DAG size of output: 2941 [2019-11-24 04:29:35,290 WARN L192 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 2889 DAG size of output: 2885 [2019-11-24 04:29:50,812 WARN L192 SmtUtils]: Spent 14.76 s on a formula simplification. DAG size of input: 6130 DAG size of output: 6130 [2019-11-24 04:30:09,523 WARN L192 SmtUtils]: Spent 15.57 s on a formula simplification. DAG size of input: 6131 DAG size of output: 6131