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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:38:43,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:38:43,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:38:43,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 01:38:43,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 01:38:43,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 01:38:43,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 01:38:43,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 01:38:43,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 01:38:43,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 01:38:43,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 01:38:43,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 01:38:43,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:38:43,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:38:43,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:38:43,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:38:43,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:38:43,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:38:43,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:38:43,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:38:43,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:38:43,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:38:43,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:38:43,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:38:43,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 01:38:43,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:38:43,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:38:43,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:38:43,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:38:43,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:38:43,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:38:43,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:38:43,664 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:38:43,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:38:43,665 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:38:43,665 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:38:43,665 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:38:43,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:38:43,666 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:38:43,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:38:43,668 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:38:43,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:38:43,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:38:43,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:38:43,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:38:43,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:38:43,669 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:38:43,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:38:43,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:38:43,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:38:43,670 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:38:43,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:38:43,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:38:43,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:38:43,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:38:43,671 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:38:43,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:38:43,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:38:43,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:38:43,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:38:43,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:38:43,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:38:43,743 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:38:43,744 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:38:43,745 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2019-09-10 01:38:43,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6932b38/e92d559b51a3490480936e82332aeca3/FLAGef79455b5 [2019-09-10 01:38:44,209 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:38:44,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2019-09-10 01:38:44,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6932b38/e92d559b51a3490480936e82332aeca3/FLAGef79455b5 [2019-09-10 01:38:44,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6932b38/e92d559b51a3490480936e82332aeca3 [2019-09-10 01:38:44,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:38:44,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:38:44,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:38:44,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:38:44,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:38:44,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:38:44" (1/1) ... [2019-09-10 01:38:44,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19027eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:44, skipping insertion in model container [2019-09-10 01:38:44,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:38:44" (1/1) ... [2019-09-10 01:38:44,632 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:38:44,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:38:44,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:38:44,870 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:38:44,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:38:45,002 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:38:45,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45 WrapperNode [2019-09-10 01:38:45,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:38:45,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:38:45,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:38:45,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:38:45,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (1/1) ... [2019-09-10 01:38:45,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:38:45,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:38:45,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:38:45,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:38:45,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (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 [2019-09-10 01:38:45,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:38:45,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:38:45,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:38:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:38:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-10 01:38:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 01:38:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:38:45,083 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2019-09-10 01:38:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:38:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:38:45,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:38:45,312 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:38:45,313 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 01:38:45,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:38:45 BoogieIcfgContainer [2019-09-10 01:38:45,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:38:45,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:38:45,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:38:45,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:38:45,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:38:44" (1/3) ... [2019-09-10 01:38:45,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d943d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:38:45, skipping insertion in model container [2019-09-10 01:38:45,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:38:45" (2/3) ... [2019-09-10 01:38:45,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d943d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:38:45, skipping insertion in model container [2019-09-10 01:38:45,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:38:45" (3/3) ... [2019-09-10 01:38:45,321 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2019-09-10 01:38:45,332 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:38:45,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:38:45,379 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:38:45,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:38:45,421 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:38:45,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:38:45,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:38:45,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:38:45,422 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:38:45,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:38:45,422 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:38:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-10 01:38:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 01:38:45,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:45,451 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:45,453 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash 276824482, now seen corresponding path program 1 times [2019-09-10 01:38:45,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:45,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:45,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:45,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:45,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:45,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:45,541 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-10 01:38:45,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,562 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 01:38:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:45,583 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 01:38:45,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:38:45,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:45,585 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:45,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,597 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:38:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:45,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-10 01:38:45,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:45,703 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 01:38:45,724 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:45,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-09-10 01:38:45,725 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:45,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:38:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:38:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:38:45,745 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2019-09-10 01:38:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:45,822 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-09-10 01:38:45,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:38:45,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-10 01:38:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:45,835 INFO L225 Difference]: With dead ends: 68 [2019-09-10 01:38:45,835 INFO L226 Difference]: Without dead ends: 62 [2019-09-10 01:38:45,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:38:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-10 01:38:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 27. [2019-09-10 01:38:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-10 01:38:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-09-10 01:38:45,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2019-09-10 01:38:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:45,879 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-09-10 01:38:45,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:38:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-09-10 01:38:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 01:38:45,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:45,882 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:45,883 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1420788200, now seen corresponding path program 1 times [2019-09-10 01:38:45,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:45,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:45,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:45,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:45,906 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:45,906 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:45,906 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-09-10 01:38:45,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,925 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:45,945 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 01:38:45,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:38:45,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:45,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:45,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:45,962 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:38:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:45,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-10 01:38:45,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,013 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,036 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:46,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-09-10 01:38:46,037 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:46,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:38:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:38:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:38:46,039 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2019-09-10 01:38:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:46,088 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2019-09-10 01:38:46,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:38:46,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-10 01:38:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:46,090 INFO L225 Difference]: With dead ends: 48 [2019-09-10 01:38:46,090 INFO L226 Difference]: Without dead ends: 48 [2019-09-10 01:38:46,091 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:38:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-10 01:38:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2019-09-10 01:38:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-10 01:38:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-09-10 01:38:46,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2019-09-10 01:38:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:46,097 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-09-10 01:38:46,097 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:38:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-09-10 01:38:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 01:38:46,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:46,099 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:46,099 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -619377979, now seen corresponding path program 1 times [2019-09-10 01:38:46,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:46,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,101 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:46,108 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:46,108 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:46,108 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-09-10 01:38:46,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,126 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,144 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 01:38:46,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:38:46,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:46,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:38:46,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,174 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-10 01:38:46,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,227 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,248 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:46,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-09-10 01:38:46,249 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:46,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:38:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:38:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:38:46,251 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 4 states. [2019-09-10 01:38:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:46,292 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2019-09-10 01:38:46,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:38:46,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-10 01:38:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:46,294 INFO L225 Difference]: With dead ends: 50 [2019-09-10 01:38:46,294 INFO L226 Difference]: Without dead ends: 50 [2019-09-10 01:38:46,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:38:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-10 01:38:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2019-09-10 01:38:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-10 01:38:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-09-10 01:38:46,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2019-09-10 01:38:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:46,300 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-09-10 01:38:46,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:38:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-09-10 01:38:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-10 01:38:46,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:46,301 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:46,302 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -603320630, now seen corresponding path program 1 times [2019-09-10 01:38:46,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:46,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,304 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:46,310 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:46,310 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:46,310 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 01:38:46,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,336 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,351 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 01:38:46,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:38:46,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:46,352 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:46,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,375 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:38:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-10 01:38:46,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,449 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:46,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~SqrtR__xnp1~0_7 Real) (v_main_~SqrtR__residu~0_14 Real) (v_main_~SqrtR__lsup~0_10 Real)) (let ((.cse0 (+ c_main_~SqrtR__xn~0 v_main_~SqrtR__xnp1~0_7))) (or (< v_main_~SqrtR__xnp1~0_7 c_main_~SqrtR__xn~0) (not (>= v_main_~SqrtR__residu~0_14 (* (* 2.0 c_~_EPS~0) .cse0))) (not (<= v_main_~SqrtR__lsup~0_10 (* c_~_EPS~0 .cse0))) (< v_main_~SqrtR__lsup~0_10 v_main_~SqrtR__residu~0_14)))) is different from false [2019-09-10 01:38:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,556 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:46,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-10 01:38:46,557 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:46,557 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:38:46,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:38:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=28, Unknown=1, NotChecked=10, Total=56 [2019-09-10 01:38:46,558 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 5 states. [2019-09-10 01:38:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:46,618 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-10 01:38:46,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:38:46,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-09-10 01:38:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:46,619 INFO L225 Difference]: With dead ends: 36 [2019-09-10 01:38:46,619 INFO L226 Difference]: Without dead ends: 36 [2019-09-10 01:38:46,620 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=35, Unknown=1, NotChecked=12, Total=72 [2019-09-10 01:38:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-10 01:38:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-09-10 01:38:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-10 01:38:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-09-10 01:38:46,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 18 [2019-09-10 01:38:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:46,627 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-09-10 01:38:46,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:38:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-09-10 01:38:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-10 01:38:46,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:46,630 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:46,630 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:46,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1476621009, now seen corresponding path program 1 times [2019-09-10 01:38:46,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:46,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:46,634 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:46,643 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:46,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:46,644 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 01:38:46,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-09-10 01:38:46,683 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [32], [34], [39], [41], [49], [52], [53], [59], [61], [74], [75], [76] [2019-09-10 01:38:46,718 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:46,718 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:46,788 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:46,810 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:46,813 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:38:46,815 INFO L272 AbstractInterpreter]: Visited 22 different actions 24 times. Merged at 1 different actions 1 times. Never widened. Performed 63 root evaluator evaluations with a maximum evaluation depth of 8. Performed 63 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 23 variables. [2019-09-10 01:38:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:46,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:38:46,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:46,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:46,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:46,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:38:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:46,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-10 01:38:46,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:38:46,994 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:47,344 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~__return_125~0_24 Real)) (or (<= 1.0 v_~__return_125~0_24) (not (>= v_~__return_125~0_24 (/ 1.0 c_main_~SqrtR__xnp1~0))))) is different from false [2019-09-10 01:38:47,416 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_main_~SqrtR__xn~0_12 Real) (v_main_~SqrtR__residu~0_16 Real) (v_main_~SqrtR__lsup~0_12 Real)) (let ((.cse0 (/ (* c_main_~SqrtR__xn~0 (+ 15.0 (* (+ (* (* c_main_~SqrtR__xn~0 (* 3.0 c_main_~SqrtR__Input~0)) c_main_~SqrtR__xn~0) (- 10.0)) (* (* c_main_~SqrtR__xn~0 c_main_~SqrtR__Input~0) c_main_~SqrtR__xn~0)))) 8.0))) (or (not (<= (+ (* 2.0 c_main_~SqrtR__xn~0) v_main_~SqrtR__residu~0_16) (* 2.0 .cse0))) (< (+ v_main_~SqrtR__residu~0_16 v_main_~SqrtR__lsup~0_12) 0.0) (not (<= v_main_~SqrtR__xn~0_12 .cse0)) (not (<= v_main_~SqrtR__lsup~0_12 (* c_~_EPS~0 (+ .cse0 v_main_~SqrtR__xn~0_12))))))) (forall ((v_~__return_125~0_24 Real)) (or (not (>= v_~__return_125~0_24 (/ 1.0 (/ (* c_main_~SqrtR__xn~0 (+ 15.0 (* (+ (* (* c_main_~SqrtR__xn~0 (* 3.0 c_main_~SqrtR__Input~0)) c_main_~SqrtR__xn~0) (- 10.0)) (* (* c_main_~SqrtR__xn~0 c_main_~SqrtR__Input~0) c_main_~SqrtR__xn~0)))) 8.0)))) (<= 1.0 v_~__return_125~0_24)))) is different from false [2019-09-10 01:38:47,443 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_~__return_125~0_24 Real)) (or (not (>= v_~__return_125~0_24 (/ 1.0 (/ (* (+ (* (+ (* 3.0 c_main_~SqrtR__Input~0) (- 10.0)) c_main_~SqrtR__Input~0) 15.0) 1.0) 8.0)))) (<= 1.0 v_~__return_125~0_24))) (< 1.0 c_main_~SqrtR__Input~0) (forall ((v_main_~SqrtR__xn~0_12 Real) (v_main_~SqrtR__residu~0_16 Real) (v_main_~SqrtR__lsup~0_12 Real)) (let ((.cse0 (/ (* (+ (* (+ (* 3.0 c_main_~SqrtR__Input~0) (- 10.0)) c_main_~SqrtR__Input~0) 15.0) 1.0) 8.0))) (or (not (<= (+ v_main_~SqrtR__residu~0_16 2.0) (* .cse0 2.0))) (< (+ v_main_~SqrtR__residu~0_16 v_main_~SqrtR__lsup~0_12) 0.0) (not (<= v_main_~SqrtR__lsup~0_12 (* c_~_EPS~0 (+ .cse0 v_main_~SqrtR__xn~0_12)))) (not (<= v_main_~SqrtR__xn~0_12 .cse0)))))) is different from true [2019-09-10 01:38:47,462 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_~__return_125~0_24 Real)) (or (<= 1.0 v_~__return_125~0_24) (not (>= v_~__return_125~0_24 (/ 1.0 (/ (* 1.0 (+ (* c_main_~main__d~0 (+ (* 3.0 c_main_~main__d~0) (- 10.0))) 15.0)) 8.0)))))) (forall ((v_main_~SqrtR__xn~0_12 Real) (v_main_~SqrtR__residu~0_16 Real) (v_main_~SqrtR__lsup~0_12 Real)) (let ((.cse0 (/ (* 1.0 (+ (* c_main_~main__d~0 (+ (* 3.0 c_main_~main__d~0) (- 10.0))) 15.0)) 8.0))) (or (not (<= v_main_~SqrtR__xn~0_12 .cse0)) (not (<= v_main_~SqrtR__lsup~0_12 (* c_~_EPS~0 (+ v_main_~SqrtR__xn~0_12 .cse0)))) (< (+ v_main_~SqrtR__residu~0_16 v_main_~SqrtR__lsup~0_12) 0.0) (not (<= (+ v_main_~SqrtR__residu~0_16 2.0) (* 2.0 .cse0)))))) (< 1.0 c_main_~main__d~0)) is different from true [2019-09-10 01:38:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-09-10 01:38:47,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 01:38:47,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-10 01:38:47,487 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:38:47,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-10 01:38:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-10 01:38:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=70, Unknown=4, NotChecked=76, Total=182 [2019-09-10 01:38:47,490 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 14 states. [2019-09-10 01:38:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:47,984 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2019-09-10 01:38:47,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-10 01:38:47,984 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-09-10 01:38:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:47,990 INFO L225 Difference]: With dead ends: 98 [2019-09-10 01:38:47,990 INFO L226 Difference]: Without dead ends: 98 [2019-09-10 01:38:47,991 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=240, Unknown=5, NotChecked=148, Total=506 [2019-09-10 01:38:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-10 01:38:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 42. [2019-09-10 01:38:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-10 01:38:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-09-10 01:38:48,007 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2019-09-10 01:38:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:48,008 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-09-10 01:38:48,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-10 01:38:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-09-10 01:38:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-10 01:38:48,009 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:48,009 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:48,010 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash 981141417, now seen corresponding path program 1 times [2019-09-10 01:38:48,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:48,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:48,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:48,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:48,012 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:48,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:48,028 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:48,028 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 01:38:48,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:48,051 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:48,071 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2019-09-10 01:38:48,072 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [32], [34], [39], [41], [44], [49], [52], [53], [57], [59], [74], [75], [76] [2019-09-10 01:38:48,077 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:48,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:48,083 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:48,104 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:38:48,104 INFO L272 AbstractInterpreter]: Visited 19 different actions 21 times. Merged at 1 different actions 1 times. Never widened. Performed 59 root evaluator evaluations with a maximum evaluation depth of 8. Performed 59 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 23 variables. [2019-09-10 01:38:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:48,105 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:38:48,186 INFO L227 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 76.6% of their original sizes. [2019-09-10 01:38:48,187 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:38:48,313 INFO L420 sIntCurrentIteration]: We unified 22 AI predicates to 22 [2019-09-10 01:38:48,313 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:38:48,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:48,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2019-09-10 01:38:48,315 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:48,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-10 01:38:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-10 01:38:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-10 01:38:48,316 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 14 states. [2019-09-10 01:38:48,560 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:49,043 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2019-09-10 01:38:49,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-10 01:38:49,043 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2019-09-10 01:38:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:49,046 INFO L225 Difference]: With dead ends: 93 [2019-09-10 01:38:49,046 INFO L226 Difference]: Without dead ends: 93 [2019-09-10 01:38:49,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2019-09-10 01:38:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-10 01:38:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 42. [2019-09-10 01:38:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-10 01:38:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-10 01:38:49,058 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 23 [2019-09-10 01:38:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:49,058 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-10 01:38:49,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-10 01:38:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-10 01:38:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-10 01:38:49,060 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:49,061 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:49,061 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 331588760, now seen corresponding path program 1 times [2019-09-10 01:38:49,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:49,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,063 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:49,075 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:49,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:49,076 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 01:38:49,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,098 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,116 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2019-09-10 01:38:49,116 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [32], [34], [39], [41], [44], [47], [49], [52], [53], [55], [59], [61], [63], [68], [70], [74], [75], [76] [2019-09-10 01:38:49,122 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:49,123 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:49,125 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:49,131 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:49,253 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:38:49,254 INFO L272 AbstractInterpreter]: Visited 28 different actions 222 times. Merged at 22 different actions 156 times. Widened at 9 different actions 24 times. Performed 850 root evaluator evaluations with a maximum evaluation depth of 8. Performed 850 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 40 fixpoints after 15 different actions. Largest state had 23 variables. [2019-09-10 01:38:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:38:49,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:49,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:38:49,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,272 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-10 01:38:49,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:49,321 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((main_~SqrtR__Input~0 Real)) (and (< 1.0 main_~SqrtR__Input~0) (= c_main_~SqrtR__xn~0 (/ 1.0 main_~SqrtR__Input~0)))) (= c_~_EPS~0 (/ 1.0 1000000.0))) is different from false [2019-09-10 01:38:49,329 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0.0 (+ c_main_~SqrtR__lsup~0 c_main_~SqrtR__linf~0)) (<= c_main_~SqrtR__lsup~0 (* (/ 1.0 2.0) c_main_~SqrtR__residu~0)) (exists ((main_~SqrtR__Input~0 Real)) (and (< 1.0 main_~SqrtR__Input~0) (= (/ 1.0 main_~SqrtR__Input~0) (* 250000.0 c_main_~SqrtR__residu~0))))) is different from false [2019-09-10 01:38:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2019-09-10 01:38:49,335 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:49,362 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~SqrtR__linf~0_15 Real) (v_main_~SqrtR__lsup~0_15 Real)) (let ((.cse1 (* 2.0 c_main_~SqrtR__xn~0))) (let ((.cse0 (* (* 2.0 c_~_EPS~0) .cse1))) (or (< .cse0 v_main_~SqrtR__linf~0_15) (< (+ v_main_~SqrtR__linf~0_15 v_main_~SqrtR__lsup~0_15) 0.0) (< v_main_~SqrtR__lsup~0_15 .cse0) (not (<= v_main_~SqrtR__lsup~0_15 (* c_~_EPS~0 .cse1))))))) is different from false [2019-09-10 01:38:49,370 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~SqrtR__Input~0 Real) (v_main_~SqrtR__linf~0_15 Real) (v_main_~SqrtR__lsup~0_15 Real)) (let ((.cse0 (* (/ 1.0 main_~SqrtR__Input~0) 2.0))) (let ((.cse1 (* (* 2.0 c_~_EPS~0) .cse0))) (or (not (<= v_main_~SqrtR__lsup~0_15 (* c_~_EPS~0 .cse0))) (<= main_~SqrtR__Input~0 1.0) (< (+ v_main_~SqrtR__linf~0_15 v_main_~SqrtR__lsup~0_15) 0.0) (< .cse1 v_main_~SqrtR__linf~0_15) (< v_main_~SqrtR__lsup~0_15 .cse1))))) is different from true [2019-09-10 01:38:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2019-09-10 01:38:49,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 01:38:49,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-09-10 01:38:49,453 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:38:49,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-10 01:38:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-10 01:38:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=16, Unknown=4, NotChecked=36, Total=72 [2019-09-10 01:38:49,454 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 9 states. [2019-09-10 01:38:49,518 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_main_~SqrtR__linf~0_15 Real) (v_main_~SqrtR__lsup~0_15 Real)) (let ((.cse1 (* 2.0 c_main_~SqrtR__xn~0))) (let ((.cse0 (* (* 2.0 c_~_EPS~0) .cse1))) (or (< .cse0 v_main_~SqrtR__linf~0_15) (< (+ v_main_~SqrtR__linf~0_15 v_main_~SqrtR__lsup~0_15) 0.0) (< v_main_~SqrtR__lsup~0_15 .cse0) (not (<= v_main_~SqrtR__lsup~0_15 (* c_~_EPS~0 .cse1))))))) (exists ((main_~SqrtR__Input~0 Real)) (and (< 1.0 main_~SqrtR__Input~0) (= c_main_~SqrtR__xn~0 (/ 1.0 main_~SqrtR__Input~0)))) (= c_~_EPS~0 (/ 1.0 1000000.0))) is different from false [2019-09-10 01:38:49,521 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0.0 (+ c_main_~SqrtR__lsup~0 c_main_~SqrtR__linf~0)) (= c_~_EPS~0 (/ 1.0 1000000.0)) (<= c_main_~SqrtR__lsup~0 (* (/ 1.0 2.0) c_main_~SqrtR__residu~0)) (exists ((main_~SqrtR__Input~0 Real)) (and (< 1.0 main_~SqrtR__Input~0) (= (/ 1.0 main_~SqrtR__Input~0) (* 250000.0 c_main_~SqrtR__residu~0)))) (or (< c_main_~SqrtR__lsup~0 c_main_~SqrtR__residu~0) (< c_main_~SqrtR__residu~0 c_main_~SqrtR__linf~0))) is different from false [2019-09-10 01:38:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:49,547 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2019-09-10 01:38:49,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:38:49,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-09-10 01:38:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:49,548 INFO L225 Difference]: With dead ends: 75 [2019-09-10 01:38:49,549 INFO L226 Difference]: Without dead ends: 75 [2019-09-10 01:38:49,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=30, Unknown=6, NotChecked=90, Total=156 [2019-09-10 01:38:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-10 01:38:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2019-09-10 01:38:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-10 01:38:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-10 01:38:49,558 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2019-09-10 01:38:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:49,559 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-10 01:38:49,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-10 01:38:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-10 01:38:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-10 01:38:49,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:49,562 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:49,563 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1475552478, now seen corresponding path program 1 times [2019-09-10 01:38:49,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:49,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,565 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:49,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:49,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:49,571 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:49,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,593 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 01:38:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,607 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2019-09-10 01:38:49,607 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [32], [34], [39], [41], [44], [47], [49], [52], [53], [55], [59], [61], [63], [68], [74], [75], [76] [2019-09-10 01:38:49,610 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:49,610 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:49,613 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:49,617 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:49,651 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:38:49,652 INFO L272 AbstractInterpreter]: Visited 26 different actions 145 times. Merged at 19 different actions 97 times. Widened at 3 different actions 10 times. Performed 543 root evaluator evaluations with a maximum evaluation depth of 8. Performed 543 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 20 fixpoints after 9 different actions. Largest state had 23 variables. [2019-09-10 01:38:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:38:49,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:49,652 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:38:49,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,670 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 01:38:49,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:38:49,707 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:38:49,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 01:38:49,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-10 01:38:49,737 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:38:49,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 01:38:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 01:38:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:38:49,738 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2019-09-10 01:38:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:49,767 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-10 01:38:49,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:38:49,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-09-10 01:38:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:49,768 INFO L225 Difference]: With dead ends: 43 [2019-09-10 01:38:49,768 INFO L226 Difference]: Without dead ends: 43 [2019-09-10 01:38:49,769 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:38:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-10 01:38:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-10 01:38:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-10 01:38:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-09-10 01:38:49,772 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 33 [2019-09-10 01:38:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:49,772 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-09-10 01:38:49,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 01:38:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-09-10 01:38:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-10 01:38:49,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:49,774 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:49,774 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1707439107, now seen corresponding path program 1 times [2019-09-10 01:38:49,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:49,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:49,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:49,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:49,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:49,780 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:49,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,804 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 01:38:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,825 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2019-09-10 01:38:49,825 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [32], [34], [39], [41], [44], [47], [49], [52], [53], [55], [59], [61], [70], [74], [75], [76] [2019-09-10 01:38:49,828 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:49,828 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:49,830 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:49,836 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:49,905 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:38:49,905 INFO L272 AbstractInterpreter]: Visited 26 different actions 186 times. Merged at 20 different actions 133 times. Widened at 6 different actions 22 times. Performed 732 root evaluator evaluations with a maximum evaluation depth of 8. Performed 732 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 29 fixpoints after 13 different actions. Largest state had 23 variables. [2019-09-10 01:38:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:49,905 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:38:49,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:49,906 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:49,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:49,926 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:38:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:49,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-10 01:38:49,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:38:50,162 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:55,230 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-09-10 01:38:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:38:55,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 01:38:55,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-10 01:38:55,411 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:38:55,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-10 01:38:55,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-10 01:38:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2019-09-10 01:38:55,412 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 14 states. [2019-09-10 01:38:58,121 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-09-10 01:38:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:58,427 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-10 01:38:58,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-10 01:38:58,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-10 01:38:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:58,429 INFO L225 Difference]: With dead ends: 50 [2019-09-10 01:38:58,429 INFO L226 Difference]: Without dead ends: 50 [2019-09-10 01:38:58,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=107, Invalid=271, Unknown=2, NotChecked=0, Total=380 [2019-09-10 01:38:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-10 01:38:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-10 01:38:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-10 01:38:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-09-10 01:38:58,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 37 [2019-09-10 01:38:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:58,436 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-09-10 01:38:58,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-10 01:38:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-09-10 01:38:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-10 01:38:58,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:58,437 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:58,438 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2041929248, now seen corresponding path program 1 times [2019-09-10 01:38:58,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:58,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:58,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:58,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:58,439 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:58,443 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:58,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:58,444 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:58,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:58,480 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 01:38:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:58,496 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2019-09-10 01:38:58,496 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [17], [19], [21], [25], [28], [30], [32], [34], [39], [41], [44], [47], [49], [52], [53], [55], [59], [61], [70], [74], [75], [76] [2019-09-10 01:38:58,501 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:38:58,501 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:38:58,503 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:38:58,506 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:38:58,566 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:38:58,566 INFO L272 AbstractInterpreter]: Visited 28 different actions 182 times. Merged at 22 different actions 124 times. Widened at 4 different actions 14 times. Performed 705 root evaluator evaluations with a maximum evaluation depth of 8. Performed 705 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 32 fixpoints after 9 different actions. Largest state had 23 variables. [2019-09-10 01:38:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:58,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:38:58,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:58,567 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:38:58,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:58,589 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:58,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-10 01:38:58,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:38:58,633 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:38:58,646 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:38:58,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-09-10 01:38:58,647 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:38:58,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:38:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:38:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-10 01:38:58,648 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 4 states. [2019-09-10 01:38:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:38:58,671 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2019-09-10 01:38:58,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:38:58,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-09-10 01:38:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:38:58,673 INFO L225 Difference]: With dead ends: 57 [2019-09-10 01:38:58,673 INFO L226 Difference]: Without dead ends: 57 [2019-09-10 01:38:58,674 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 01:38:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-10 01:38:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2019-09-10 01:38:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-10 01:38:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2019-09-10 01:38:58,677 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2019-09-10 01:38:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:38:58,680 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2019-09-10 01:38:58,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:38:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2019-09-10 01:38:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-10 01:38:58,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:38:58,684 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:38:58,684 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:38:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:38:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 716182498, now seen corresponding path program 2 times [2019-09-10 01:38:58,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:38:58,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:58,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:38:58,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:38:58,687 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:38:58,698 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 01:38:58,698 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 01:38:58,698 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 01:38:58,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:38:58,721 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 01:38:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:38:58,754 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:38:58,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:38:58,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:38:58,754 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:38:58,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:38:58,776 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:38:58,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 01:38:58,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:38:58,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-10 01:38:58,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:38:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:38:58,995 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:38:59,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~SqrtR__residu~0_35 Real)) (or (< (* c_~_EPS~0 (+ (* 2.0 c_main_~SqrtR__xn~0) v_main_~SqrtR__residu~0_35)) v_main_~SqrtR__residu~0_35) (not (= (+ c_main_~SqrtR__xn~0 (* (/ 1.0 2.0) v_main_~SqrtR__residu~0_35)) (/ (* c_main_~SqrtR__xn~0 (+ 15.0 (* (+ (* (* c_main_~SqrtR__xn~0 (* 3.0 c_main_~SqrtR__Input~0)) c_main_~SqrtR__xn~0) (- 10.0)) (* (* c_main_~SqrtR__xn~0 c_main_~SqrtR__Input~0) c_main_~SqrtR__xn~0)))) 8.0))))) is different from false [2019-09-10 01:39:01,138 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~SqrtR__residu~0_35 Real)) (let ((.cse1 (* 3.0 c_main_~SqrtR__Input~0))) (let ((.cse0 (/ (* c_main_~SqrtR__xn~0 (+ 15.0 (* (+ (* (* c_main_~SqrtR__xn~0 .cse1) c_main_~SqrtR__xn~0) (- 10.0)) (* (* c_main_~SqrtR__xn~0 c_main_~SqrtR__Input~0) c_main_~SqrtR__xn~0)))) 8.0))) (or (< (* c_~_EPS~0 (+ v_main_~SqrtR__residu~0_35 (* 2.0 .cse0))) v_main_~SqrtR__residu~0_35) (not (= (+ (* (/ 1.0 2.0) v_main_~SqrtR__residu~0_35) .cse0) (/ (* (+ 15.0 (* (* (* c_main_~SqrtR__Input~0 .cse0) .cse0) (+ (* (* .cse0 .cse1) .cse0) (- 10.0)))) .cse0) 8.0))))))) is different from false [2019-09-10 01:39:03,159 WARN L860 $PredicateComparison]: unable to prove that (or (<= c_main_~SqrtR__Input~0 1.0) (forall ((v_main_~SqrtR__residu~0_35 Real)) (let ((.cse1 (* 3.0 c_main_~SqrtR__Input~0))) (let ((.cse0 (/ (let ((.cse2 (/ 1.0 c_main_~SqrtR__Input~0))) (* (+ 15.0 (* (+ (* .cse2 (* .cse2 .cse1)) (- 10.0)) (* .cse2 (* c_main_~SqrtR__Input~0 .cse2)))) .cse2)) 8.0))) (or (not (= (+ (* (/ 1.0 2.0) v_main_~SqrtR__residu~0_35) .cse0) (/ (* (+ (* (+ (* (* .cse1 .cse0) .cse0) (- 10.0)) (* (* c_main_~SqrtR__Input~0 .cse0) .cse0)) 15.0) .cse0) 8.0))) (< (* c_~_EPS~0 (+ v_main_~SqrtR__residu~0_35 (* 2.0 .cse0))) v_main_~SqrtR__residu~0_35)))))) is different from true [2019-09-10 01:39:05,227 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_main_~SqrtR__residu~0_35 Real)) (let ((.cse1 (* 3.0 c_main_~main__d~0))) (let ((.cse0 (/ (let ((.cse2 (/ 1.0 c_main_~main__d~0))) (* (+ 15.0 (* (* .cse2 (* .cse2 c_main_~main__d~0)) (+ (* (* .cse1 .cse2) .cse2) (- 10.0)))) .cse2)) 8.0))) (or (not (= (/ (* .cse0 (+ 15.0 (* (* .cse0 (* .cse0 c_main_~main__d~0)) (+ (- 10.0) (* .cse0 (* .cse1 .cse0)))))) 8.0) (+ (* (/ 1.0 2.0) v_main_~SqrtR__residu~0_35) .cse0))) (< (* c_~_EPS~0 (+ v_main_~SqrtR__residu~0_35 (* .cse0 2.0))) v_main_~SqrtR__residu~0_35))))) (<= c_main_~main__d~0 1.0)) is different from true [2019-09-10 01:39:05,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:39:05,482 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:829) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1428) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:631) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 40 more [2019-09-10 01:39:05,489 INFO L168 Benchmark]: Toolchain (without parser) took 20876.39 ms. Allocated memory was 140.5 MB in the beginning and 293.6 MB in the end (delta: 153.1 MB). Free memory was 88.3 MB in the beginning and 192.5 MB in the end (delta: -104.2 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,490 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,490 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.54 ms. Allocated memory was 140.5 MB in the beginning and 199.8 MB in the end (delta: 59.2 MB). Free memory was 88.1 MB in the beginning and 176.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,491 INFO L168 Benchmark]: Boogie Preprocessor took 27.71 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 175.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,492 INFO L168 Benchmark]: RCFGBuilder took 282.87 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 160.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,493 INFO L168 Benchmark]: TraceAbstraction took 20171.22 ms. Allocated memory was 199.8 MB in the beginning and 293.6 MB in the end (delta: 93.8 MB). Free memory was 160.1 MB in the beginning and 192.5 MB in the end (delta: -32.4 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:05,497 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 385.54 ms. Allocated memory was 140.5 MB in the beginning and 199.8 MB in the end (delta: 59.2 MB). Free memory was 88.1 MB in the beginning and 176.9 MB in the end (delta: -88.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.71 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 175.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 282.87 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 160.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20171.22 ms. Allocated memory was 199.8 MB in the beginning and 293.6 MB in the end (delta: 93.8 MB). Free memory was 160.1 MB in the beginning and 192.5 MB in the end (delta: -32.4 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...