/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/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:24:06,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:24:06,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:24:06,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:24:06,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:24:06,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:24:06,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:24:06,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:24:06,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:24:06,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:24:06,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:24:06,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:24:06,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:24:06,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:24:06,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:24:06,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:24:06,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:24:06,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:24:06,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:24:06,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:24:06,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:24:06,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:24:06,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:24:06,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:24:06,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:24:06,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:24:06,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:24:06,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:24:06,510 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 04:24:06,533 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:24:06,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:24:06,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:24:06,534 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:24:06,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:24:06,534 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:24:06,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:24:06,534 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:24:06,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:24:06,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:24:06,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:24:06,535 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:24:06,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:24:06,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:24:06,536 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:24:06,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:24:06,537 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:24:06,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:24:06,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:24:06,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:24:06,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:24:06,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:24:06,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:24:06,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:24:06,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:24:06,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:24:06,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:24:06,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:24:06,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:24:06,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:24:06,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:24:06,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:24:06,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:24:06,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:24:06,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:24:06,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:24:06,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:24:06,863 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:24:06,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-24 04:24:06,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21f8053b/513432bc8bed4a91a65cfb36d3493632/FLAG5099af671 [2019-11-24 04:24:07,393 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:24:07,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-24 04:24:07,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21f8053b/513432bc8bed4a91a65cfb36d3493632/FLAG5099af671 [2019-11-24 04:24:07,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d21f8053b/513432bc8bed4a91a65cfb36d3493632 [2019-11-24 04:24:07,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:24:07,837 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:24:07,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:07,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:24:07,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:24:07,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:07" (1/1) ... [2019-11-24 04:24:07,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41aa1363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:07, skipping insertion in model container [2019-11-24 04:24:07,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:24:07" (1/1) ... [2019-11-24 04:24:07,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:24:07,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:24:08,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:08,048 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:24:08,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:24:08,080 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:24:08,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08 WrapperNode [2019-11-24 04:24:08,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:24:08,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:08,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:24:08,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:24:08,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:24:08,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:24:08,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:24:08,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:24:08,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (1/1) ... [2019-11-24 04:24:08,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:24:08,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:24:08,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:24:08,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:24:08,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (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 04:24:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:24:08,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:24:08,459 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:24:08,459 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 04:24:08,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:08 BoogieIcfgContainer [2019-11-24 04:24:08,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:24:08,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:24:08,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:24:08,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:24:08,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:24:07" (1/3) ... [2019-11-24 04:24:08,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a99e84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:08, skipping insertion in model container [2019-11-24 04:24:08,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:24:08" (2/3) ... [2019-11-24 04:24:08,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a99e84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:24:08, skipping insertion in model container [2019-11-24 04:24:08,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:24:08" (3/3) ... [2019-11-24 04:24:08,469 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-11-24 04:24:08,479 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:24:08,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:24:08,498 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:24:08,532 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:24:08,532 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:24:08,532 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:24:08,532 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:24:08,533 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:24:08,533 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:24:08,533 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:24:08,533 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:24:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:24:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:24:08,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:08,562 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:24:08,563 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1724589170, now seen corresponding path program 1 times [2019-11-24 04:24:08,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:08,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079319270] [2019-11-24 04:24:08,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:08,668 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:24:08,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949139336] [2019-11-24 04:24:08,669 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 04:24:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:08,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:24:08,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:08,762 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 04:24:08,762 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:08,802 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 04:24:08,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079319270] [2019-11-24 04:24:08,804 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:24:08,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949139336] [2019-11-24 04:24:08,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:24:08,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-24 04:24:08,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707817603] [2019-11-24 04:24:08,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:24:08,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:24:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:24:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:08,828 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 5 states. [2019-11-24 04:24:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:24:08,891 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-11-24 04:24:08,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:24:08,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-24 04:24:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:24:08,902 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:24:08,902 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:24:08,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:24:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:24:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:24:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:24:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-24 04:24:08,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-24 04:24:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:24:08,936 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-24 04:24:08,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:24:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-24 04:24:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:24:08,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:24:08,937 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:24:09,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:24:09,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:24:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:24:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1922594244, now seen corresponding path program 1 times [2019-11-24 04:24:09,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:24:09,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172763875] [2019-11-24 04:24:09,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:24:09,155 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-24 04:24:09,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283044127] [2019-11-24 04:24:09,155 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 [2019-11-24 04:24:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:24:09,204 WARN L253 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 04:24:09,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:24:09,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:24:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:09,266 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:24:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:24:09,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172763875] [2019-11-24 04:24:09,513 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:24:09,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283044127] [2019-11-24 04:24:09,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438978405] [2019-11-24 04:24:09,535 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:24:09,535 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:24:09,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:24:09,550 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:24:09,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:24:10,731 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-24 04:24:10,907 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 271 [2019-11-24 04:24:11,138 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 342 [2019-11-24 04:24:11,391 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 333 [2019-11-24 04:24:11,655 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 405 [2019-11-24 04:24:11,986 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 405 [2019-11-24 04:24:12,401 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 528 [2019-11-24 04:24:12,865 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 522 [2019-11-24 04:24:13,420 WARN L192 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 628 [2019-11-24 04:24:14,291 WARN L192 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 620 [2019-11-24 04:24:14,914 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 622 [2019-11-24 04:24:15,371 WARN L192 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 623 [2019-11-24 04:24:16,142 WARN L192 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 765 [2019-11-24 04:24:16,895 WARN L192 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 764 [2019-11-24 04:24:17,929 WARN L192 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 925 DAG size of output: 919 [2019-11-24 04:24:19,076 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 913 DAG size of output: 909 [2019-11-24 04:24:20,252 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 912 [2019-11-24 04:24:21,334 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 913 DAG size of output: 913 [2019-11-24 04:24:22,911 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1114 DAG size of output: 1111 [2019-11-24 04:24:24,910 WARN L192 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 1112 DAG size of output: 1111 [2019-11-24 04:24:27,611 WARN L192 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 1408 DAG size of output: 1404 [2019-11-24 04:24:30,319 WARN L192 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 1404 DAG size of output: 1400 [2019-11-24 04:24:33,205 WARN L192 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 1403 [2019-11-24 04:24:36,047 WARN L192 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 1404 DAG size of output: 1403 [2019-11-24 04:24:38,966 WARN L192 SmtUtils]: Spent 2.75 s on a formula simplification that was a NOOP. DAG size: 1408 [2019-11-24 04:24:41,738 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 1409 DAG size of output: 1409 [2019-11-24 04:24:46,329 WARN L192 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 1750 DAG size of output: 1747 [2019-11-24 04:24:51,198 WARN L192 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 1748 DAG size of output: 1747 [2019-11-24 04:24:58,525 WARN L192 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 2121 DAG size of output: 2117 [2019-11-24 04:25:06,347 WARN L192 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 2113 DAG size of output: 2113 [2019-11-24 04:25:16,991 WARN L192 SmtUtils]: Spent 10.53 s on a formula simplification. DAG size of input: 2616 DAG size of output: 2611 [2019-11-24 04:25:29,232 WARN L192 SmtUtils]: Spent 12.04 s on a formula simplification. DAG size of input: 2607 DAG size of output: 2604 [2019-11-24 04:25:46,194 WARN L192 SmtUtils]: Spent 16.81 s on a formula simplification. DAG size of input: 3162 DAG size of output: 3154