/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:49:44,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:49:44,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:49:44,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:49:44,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:49:44,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:49:44,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:49:44,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:49:44,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:49:44,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:49:44,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:49:44,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:49:44,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:49:44,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:49:44,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:49:44,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:49:44,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:49:44,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:49:44,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:49:44,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:49:44,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:49:44,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:49:44,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:49:44,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:49:44,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:49:44,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:49:44,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:49:44,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:49:44,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:49:44,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:49:44,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:49:44,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:49:44,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:49:44,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:49:44,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:49:44,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:49:44,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:49:44,576 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:49:44,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:49:44,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:49:44,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:49:44,578 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:49:44,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:49:44,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:49:44,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:49:44,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:49:44,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:49:44,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:49:44,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:49:44,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:49:44,580 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:49:44,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:49:44,580 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:49:44,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:49:44,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:49:44,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:49:44,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:49:44,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:49:44,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:49:44,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:49:44,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:49:44,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:49:44,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:49:44,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:49:44,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:49:44,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:49:44,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:49:44,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:49:44,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:49:44,874 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:49:44,874 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:49:44,875 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-06 18:49:44,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fa05e26/8497b9222b0747489c2545ea4c37fdc7/FLAG789240059 [2019-11-06 18:49:45,385 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:49:45,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-06 18:49:45,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fa05e26/8497b9222b0747489c2545ea4c37fdc7/FLAG789240059 [2019-11-06 18:49:45,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fa05e26/8497b9222b0747489c2545ea4c37fdc7 [2019-11-06 18:49:45,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:49:45,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:49:45,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:45,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:49:45,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:49:45,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:45" (1/1) ... [2019-11-06 18:49:45,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:45, skipping insertion in model container [2019-11-06 18:49:45,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:45" (1/1) ... [2019-11-06 18:49:45,805 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:49:45,825 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:49:46,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:46,013 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:49:46,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:46,059 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:49:46,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46 WrapperNode [2019-11-06 18:49:46,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:46,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:49:46,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:49:46,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:49:46,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... [2019-11-06 18:49:46,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:49:46,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:49:46,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:49:46,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:49:46,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:49:46,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:49:46,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:49:46,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:49:46,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:49:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:49:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:49:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:49:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:49:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:49:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:49:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:49:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:49:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:49:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:49:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:49:46,537 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:49:46,537 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:49:46,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:46 BoogieIcfgContainer [2019-11-06 18:49:46,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:49:46,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:49:46,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:49:46,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:49:46,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:49:45" (1/3) ... [2019-11-06 18:49:46,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d15830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:46, skipping insertion in model container [2019-11-06 18:49:46,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:46" (2/3) ... [2019-11-06 18:49:46,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d15830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:46, skipping insertion in model container [2019-11-06 18:49:46,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:46" (3/3) ... [2019-11-06 18:49:46,555 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2019-11-06 18:49:46,567 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:49:46,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:49:46,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:49:46,617 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:49:46,618 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:49:46,618 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:49:46,618 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:49:46,618 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:49:46,618 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:49:46,618 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:49:46,618 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:49:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-06 18:49:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:49:46,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:46,640 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:46,642 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-11-06 18:49:46,656 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:46,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696641347] [2019-11-06 18:49:46,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:46,738 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:46,738 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126991380] [2019-11-06 18:49:46,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:46,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:46,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:46,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696641347] [2019-11-06 18:49:46,871 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:46,871 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126991380] [2019-11-06 18:49:46,872 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:46,872 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:49:46,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288026687] [2019-11-06 18:49:46,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:49:46,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:49:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:49:46,897 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-06 18:49:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:46,993 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-11-06 18:49:46,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:49:46,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:49:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:47,003 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:49:47,004 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:49:47,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:49:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:49:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-06 18:49:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:49:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:49:47,046 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-11-06 18:49:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:47,047 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:49:47,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:49:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:49:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:49:47,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:47,048 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:47,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:47,250 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-11-06 18:49:47,252 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:47,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202308605] [2019-11-06 18:49:47,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:47,264 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:47,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811333442] [2019-11-06 18:49:47,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:47,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:47,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:47,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202308605] [2019-11-06 18:49:47,347 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:47,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811333442] [2019-11-06 18:49:47,348 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:47,348 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:47,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642380088] [2019-11-06 18:49:47,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:47,351 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:47,352 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:49:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:47,414 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-11-06 18:49:47,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:47,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:49:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:47,418 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:49:47,418 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:49:47,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:49:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-11-06 18:49:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:49:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-06 18:49:47,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2019-11-06 18:49:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:47,431 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-06 18:49:47,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-06 18:49:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:49:47,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:47,433 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:47,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:47,642 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-11-06 18:49:47,643 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:47,644 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263954506] [2019-11-06 18:49:47,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:47,653 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:47,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585299236] [2019-11-06 18:49:47,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:47,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:47,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:47,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263954506] [2019-11-06 18:49:47,735 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:47,736 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585299236] [2019-11-06 18:49:47,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:47,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:49:47,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342382507] [2019-11-06 18:49:47,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:47,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:47,738 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2019-11-06 18:49:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:47,842 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-11-06 18:49:47,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:47,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 18:49:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:47,846 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:49:47,847 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:49:47,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:49:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2019-11-06 18:49:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:49:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 18:49:47,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-11-06 18:49:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:47,868 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 18:49:47,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 18:49:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:49:47,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:47,870 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:48,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,075 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-11-06 18:49:48,077 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:48,077 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918195768] [2019-11-06 18:49:48,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:48,086 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:48,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700671589] [2019-11-06 18:49:48,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:49:48,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:48,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:48,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:49:48,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918195768] [2019-11-06 18:49:48,181 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:48,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700671589] [2019-11-06 18:49:48,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:48,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:48,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662441571] [2019-11-06 18:49:48,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:48,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:48,184 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-11-06 18:49:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:48,234 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-11-06 18:49:48,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:48,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:49:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:48,236 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:49:48,236 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:49:48,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:49:48,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2019-11-06 18:49:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:49:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 18:49:48,244 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2019-11-06 18:49:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:48,244 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 18:49:48,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 18:49:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:49:48,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:48,246 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:48,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,447 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -362294696, now seen corresponding path program 1 times [2019-11-06 18:49:48,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:48,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367274811] [2019-11-06 18:49:48,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:48,457 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:48,457 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370346774] [2019-11-06 18:49:48,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:48,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:49:48,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:49:48,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367274811] [2019-11-06 18:49:48,546 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:48,547 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370346774] [2019-11-06 18:49:48,547 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:48,547 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:49:48,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159244788] [2019-11-06 18:49:48,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:49:48,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:49:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:48,549 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-11-06 18:49:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:48,669 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2019-11-06 18:49:48,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:49:48,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-06 18:49:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:48,671 INFO L225 Difference]: With dead ends: 79 [2019-11-06 18:49:48,671 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:49:48,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:49:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2019-11-06 18:49:48,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:49:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 18:49:48,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-11-06 18:49:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:48,680 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 18:49:48,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:49:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 18:49:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:49:48,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:48,681 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:48,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,884 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1895729479, now seen corresponding path program 2 times [2019-11-06 18:49:48,885 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:48,885 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264291548] [2019-11-06 18:49:48,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:48,892 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:48,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673305553] [2019-11-06 18:49:48,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:48,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:48,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:48,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:48,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:49:48,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264291548] [2019-11-06 18:49:48,985 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:48,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673305553] [2019-11-06 18:49:48,986 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:48,986 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:49:48,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687559799] [2019-11-06 18:49:48,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:48,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:48,987 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-06 18:49:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:49,062 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-11-06 18:49:49,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:49,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-06 18:49:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:49,064 INFO L225 Difference]: With dead ends: 69 [2019-11-06 18:49:49,064 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:49:49,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:49:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2019-11-06 18:49:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:49:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-06 18:49:49,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2019-11-06 18:49:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:49,073 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-06 18:49:49,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-06 18:49:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:49:49,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:49,075 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:49,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:49,278 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:49,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1579223859, now seen corresponding path program 3 times [2019-11-06 18:49:49,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:49,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610855308] [2019-11-06 18:49:49,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:49,295 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:49,295 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824733993] [2019-11-06 18:49:49,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:49,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:49:49,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:49,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:49,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:49:49,357 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610855308] [2019-11-06 18:49:49,357 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:49,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824733993] [2019-11-06 18:49:49,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:49,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:49:49,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544450895] [2019-11-06 18:49:49,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:49,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:49,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:49,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:49,359 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2019-11-06 18:49:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:49,410 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2019-11-06 18:49:49,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:49,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-06 18:49:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:49,413 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:49:49,413 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:49:49,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:49:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2019-11-06 18:49:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:49:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-11-06 18:49:49,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2019-11-06 18:49:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:49,425 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-11-06 18:49:49,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-11-06 18:49:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:49:49,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:49,426 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:49,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:49,635 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1507565378, now seen corresponding path program 4 times [2019-11-06 18:49:49,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:49,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449070625] [2019-11-06 18:49:49,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:49,653 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:49,653 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709220218] [2019-11-06 18:49:49,653 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:49,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:49:49,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:49,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:49,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:49:49,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449070625] [2019-11-06 18:49:49,741 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:49,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709220218] [2019-11-06 18:49:49,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:49,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:49:49,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100387295] [2019-11-06 18:49:49,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:49,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:49,743 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2019-11-06 18:49:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:49,807 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2019-11-06 18:49:49,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:49,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-06 18:49:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:49,809 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:49:49,809 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:49:49,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:49:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-06 18:49:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:49:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-11-06 18:49:49,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 34 [2019-11-06 18:49:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:49,819 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-11-06 18:49:49,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-11-06 18:49:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:49:49,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:49,820 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:50,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:50,024 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:50,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1070464288, now seen corresponding path program 1 times [2019-11-06 18:49:50,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:50,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18695761] [2019-11-06 18:49:50,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:50,033 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:50,033 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682552476] [2019-11-06 18:49:50,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:50,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:49:50,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:49:50,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18695761] [2019-11-06 18:49:50,157 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:50,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682552476] [2019-11-06 18:49:50,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:50,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:49:50,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883579059] [2019-11-06 18:49:50,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:49:50,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:49:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:50,159 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2019-11-06 18:49:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:50,259 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2019-11-06 18:49:50,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:49:50,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-06 18:49:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:50,261 INFO L225 Difference]: With dead ends: 114 [2019-11-06 18:49:50,261 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:49:50,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:49:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2019-11-06 18:49:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:49:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-11-06 18:49:50,271 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 36 [2019-11-06 18:49:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:50,271 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-11-06 18:49:50,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:49:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-11-06 18:49:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:49:50,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:50,272 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:50,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:50,476 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -620673214, now seen corresponding path program 2 times [2019-11-06 18:49:50,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:50,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060198622] [2019-11-06 18:49:50,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:50,484 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:50,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613581440] [2019-11-06 18:49:50,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:50,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:50,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:50,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:49:50,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:49:50,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060198622] [2019-11-06 18:49:50,608 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:50,608 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613581440] [2019-11-06 18:49:50,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:50,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:49:50,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43853314] [2019-11-06 18:49:50,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:49:50,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:49:50,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:49:50,610 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 8 states. [2019-11-06 18:49:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:50,733 INFO L93 Difference]: Finished difference Result 129 states and 165 transitions. [2019-11-06 18:49:50,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:49:50,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-11-06 18:49:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:50,735 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:49:50,736 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:49:50,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:49:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:49:50,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 46. [2019-11-06 18:49:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:49:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-11-06 18:49:50,747 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 38 [2019-11-06 18:49:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:50,747 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-11-06 18:49:50,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:49:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-11-06 18:49:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:49:50,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:50,749 INFO L410 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:50,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:50,954 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash 11267488, now seen corresponding path program 3 times [2019-11-06 18:49:50,955 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:50,955 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990542200] [2019-11-06 18:49:50,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:50,961 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:50,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104787275] [2019-11-06 18:49:50,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:51,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:49:51,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:51,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 18:49:51,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:51,066 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-06 18:49:51,067 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:51,080 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:51,080 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:49:51,080 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-06 18:49:51,174 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-11-06 18:49:51,175 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:51,197 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:51,197 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:49:51,197 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-11-06 18:49:51,258 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:51,259 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 101 [2019-11-06 18:49:51,260 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:51,333 INFO L567 ElimStorePlain]: treesize reduction 81, result has 45.6 percent of original size [2019-11-06 18:49:51,335 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:49:51,336 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:68 [2019-11-06 18:49:57,602 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:49:57,604 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 13 [2019-11-06 18:49:57,605 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:49:57,615 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:49:57,615 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:49:57,616 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:3 [2019-11-06 18:49:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 18:49:57,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990542200] [2019-11-06 18:49:57,692 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:57,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104787275] [2019-11-06 18:49:57,692 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:57,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-06 18:49:57,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936069052] [2019-11-06 18:49:57,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:49:57,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:49:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2019-11-06 18:49:57,694 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 15 states. [2019-11-06 18:50:09,519 WARN L191 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 56