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/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:46,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:46,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:46,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:46,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:46,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:46,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:46,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:46,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:46,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:46,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:46,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:46,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:46,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:46,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:46,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:46,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:46,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:46,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:46,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:46,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:46,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:46,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:46,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:46,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:48:46,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:48:46,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:48:46,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:48:46,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:48:46,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:48:46,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:46,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:46,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:46,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:46,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:46,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:46,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:46,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:46,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:46,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:46,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:46,716 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 [2019-10-14 21:48:46,749 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:46,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:46,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:46,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:46,751 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:46,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:46,751 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:46,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:46,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:46,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:46,753 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:46,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:46,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:46,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:46,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:46,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:46,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:46,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:46,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:46,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:46,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:46,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:46,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:46,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:47,026 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:47,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:47,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:47,043 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:47,043 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:47,044 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-14 21:48:47,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa51315e/a2d93b1812dc45ea85eb9557a02fb4c9/FLAG0f72601ee [2019-10-14 21:48:47,556 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:47,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-14 21:48:47,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa51315e/a2d93b1812dc45ea85eb9557a02fb4c9/FLAG0f72601ee [2019-10-14 21:48:47,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fa51315e/a2d93b1812dc45ea85eb9557a02fb4c9 [2019-10-14 21:48:47,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:47,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:47,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:47,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:47,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:47,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:47" (1/1) ... [2019-10-14 21:48:47,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6912290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:47, skipping insertion in model container [2019-10-14 21:48:47,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:47" (1/1) ... [2019-10-14 21:48:47,978 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:48,001 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:48,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:48,247 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:48,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:48,376 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:48,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48 WrapperNode [2019-10-14 21:48:48,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:48,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:48,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:48,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:48,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (1/1) ... [2019-10-14 21:48:48,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:48,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:48,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:48,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:48,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (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 [2019-10-14 21:48:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:48,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:48,805 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:48,805 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:48:48,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:48 BoogieIcfgContainer [2019-10-14 21:48:48,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:48,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:48,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:48,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:48,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:47" (1/3) ... [2019-10-14 21:48:48,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e8aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:48, skipping insertion in model container [2019-10-14 21:48:48,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:48" (2/3) ... [2019-10-14 21:48:48,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e8aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:48, skipping insertion in model container [2019-10-14 21:48:48,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:48" (3/3) ... [2019-10-14 21:48:48,819 INFO L109 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2019-10-14 21:48:48,828 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:48,835 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:48,846 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:48,869 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:48,869 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:48,870 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:48,870 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:48,870 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:48,870 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:48,870 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:48,870 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-14 21:48:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:48,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:48,892 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:48,894 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:48,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1187401570, now seen corresponding path program 1 times [2019-10-14 21:48:48,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:48,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728627286] [2019-10-14 21:48:48,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:48,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:48,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:48,975 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:48,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026159075] [2019-10-14 21:48:48,976 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 [2019-10-14 21:48:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:49,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:49,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:49,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728627286] [2019-10-14 21:48:49,068 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:49,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026159075] [2019-10-14 21:48:49,069 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:49,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:49,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236060620] [2019-10-14 21:48:49,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:49,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:49,085 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-10-14 21:48:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:49,107 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2019-10-14 21:48:49,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:49,109 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-14 21:48:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:49,116 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:48:49,116 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:48:49,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:48:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:48:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:48:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-10-14 21:48:49,158 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2019-10-14 21:48:49,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:49,158 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-10-14 21:48:49,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-10-14 21:48:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:49,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:49,160 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:49,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:49,362 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash -738632508, now seen corresponding path program 1 times [2019-10-14 21:48:49,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:49,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638597896] [2019-10-14 21:48:49,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:49,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:49,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:49,375 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:49,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414543030] [2019-10-14 21:48:49,376 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 [2019-10-14 21:48:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:49,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:49,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:49,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638597896] [2019-10-14 21:48:49,465 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:49,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414543030] [2019-10-14 21:48:49,466 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:49,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:49,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800798207] [2019-10-14 21:48:49,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:49,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:49,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:49,469 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2019-10-14 21:48:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:49,542 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-10-14 21:48:49,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:49,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:48:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:49,545 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:48:49,545 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:48:49,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:48:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-14 21:48:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:48:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-14 21:48:49,562 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-10-14 21:48:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:49,563 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-14 21:48:49,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-14 21:48:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:49,566 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:49,567 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:49,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:49,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:49,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1951122805, now seen corresponding path program 1 times [2019-10-14 21:48:49,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:49,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232088690] [2019-10-14 21:48:49,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:49,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:49,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:49,784 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:49,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997045176] [2019-10-14 21:48:49,784 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 [2019-10-14 21:48:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:49,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:49,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:49,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232088690] [2019-10-14 21:48:49,859 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:49,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997045176] [2019-10-14 21:48:49,860 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:49,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:49,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291354189] [2019-10-14 21:48:49,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:49,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:49,867 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-14 21:48:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:49,968 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-10-14 21:48:49,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:49,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:48:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:49,972 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:49,972 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:48:49,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:48:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-14 21:48:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:48:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-10-14 21:48:49,985 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2019-10-14 21:48:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:49,986 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-10-14 21:48:49,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-10-14 21:48:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:48:49,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:49,988 INFO L380 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] [2019-10-14 21:48:50,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:50,192 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash 271293506, now seen corresponding path program 1 times [2019-10-14 21:48:50,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:50,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020979619] [2019-10-14 21:48:50,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:50,202 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:50,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345660892] [2019-10-14 21:48:50,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:50,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:50,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:50,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020979619] [2019-10-14 21:48:50,270 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:50,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345660892] [2019-10-14 21:48:50,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:50,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:50,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173640698] [2019-10-14 21:48:50,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:50,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:50,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:50,272 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 4 states. [2019-10-14 21:48:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:50,369 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-10-14 21:48:50,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:50,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:48:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:50,371 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:50,371 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:48:50,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:48:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-10-14 21:48:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:48:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-10-14 21:48:50,381 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2019-10-14 21:48:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:50,381 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-10-14 21:48:50,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-10-14 21:48:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:48:50,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:50,382 INFO L380 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, 1] [2019-10-14 21:48:50,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:50,586 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780548, now seen corresponding path program 1 times [2019-10-14 21:48:50,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:50,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434945891] [2019-10-14 21:48:50,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:50,597 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:50,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480645441] [2019-10-14 21:48:50,597 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 [2019-10-14 21:48:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:50,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:50,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:50,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434945891] [2019-10-14 21:48:50,673 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:50,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480645441] [2019-10-14 21:48:50,673 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:50,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:50,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975583152] [2019-10-14 21:48:50,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:50,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:50,675 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2019-10-14 21:48:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:50,796 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-10-14 21:48:50,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:50,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:48:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:50,798 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:48:50,798 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:48:50,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:48:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-10-14 21:48:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:48:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-14 21:48:50,817 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2019-10-14 21:48:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:50,818 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-14 21:48:50,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-14 21:48:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:48:50,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:50,820 INFO L380 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, 1] [2019-10-14 21:48:51,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:51,033 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 131367810, now seen corresponding path program 2 times [2019-10-14 21:48:51,034 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-14 21:48:51,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,040 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789049934] [2019-10-14 21:48:51,041 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 [2019-10-14 21:48:51,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:51,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:51,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:51,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301164616] [2019-10-14 21:48:51,103 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789049934] [2019-10-14 21:48:51,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:51,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:51,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390225622] [2019-10-14 21:48:51,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:51,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:51,108 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2019-10-14 21:48:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:51,165 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2019-10-14 21:48:51,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:51,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:48:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:51,167 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:48:51,167 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:48:51,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:48:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-10-14 21:48:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:48:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-10-14 21:48:51,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2019-10-14 21:48:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:51,178 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-10-14 21:48:51,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-10-14 21:48:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:48:51,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,179 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:51,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:51,392 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1605521934, now seen corresponding path program 1 times [2019-10-14 21:48:51,393 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556401495] [2019-10-14 21:48:51,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,409 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499644384] [2019-10-14 21:48:51,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:48:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:51,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:48:51,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556401495] [2019-10-14 21:48:51,504 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499644384] [2019-10-14 21:48:51,504 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:51,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:51,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469741094] [2019-10-14 21:48:51,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:51,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:51,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:51,506 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2019-10-14 21:48:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:51,602 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2019-10-14 21:48:51,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:51,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-10-14 21:48:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:51,603 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:48:51,603 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:48:51,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:48:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-10-14 21:48:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:48:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2019-10-14 21:48:51,614 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2019-10-14 21:48:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:51,614 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2019-10-14 21:48:51,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2019-10-14 21:48:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:48:51,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,615 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:51,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:51,820 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -675781077, now seen corresponding path program 2 times [2019-10-14 21:48:51,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023206312] [2019-10-14 21:48:51,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,836 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551523259] [2019-10-14 21:48:51,837 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 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 [2019-10-14 21:48:51,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:51,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:51,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:48:51,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023206312] [2019-10-14 21:48:51,968 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551523259] [2019-10-14 21:48:51,969 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:51,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:51,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743753794] [2019-10-14 21:48:51,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:51,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:51,971 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 7 states. [2019-10-14 21:48:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,082 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2019-10-14 21:48:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:52,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-10-14 21:48:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,087 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:48:52,088 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:48:52,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:48:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-10-14 21:48:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:48:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-10-14 21:48:52,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2019-10-14 21:48:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,102 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-10-14 21:48:52,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-10-14 21:48:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:52,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,103 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:52,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,307 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1399380910, now seen corresponding path program 3 times [2019-10-14 21:48:52,308 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289974083] [2019-10-14 21:48:52,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,316 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372646531] [2019-10-14 21:48:52,317 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 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 [2019-10-14 21:48:52,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:52,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:52,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:48:52,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289974083] [2019-10-14 21:48:52,403 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372646531] [2019-10-14 21:48:52,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:52,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:52,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831426840] [2019-10-14 21:48:52,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:52,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:52,405 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 5 states. [2019-10-14 21:48:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,484 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2019-10-14 21:48:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:52,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-10-14 21:48:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,486 INFO L225 Difference]: With dead ends: 197 [2019-10-14 21:48:52,486 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 21:48:52,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 21:48:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-10-14 21:48:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:48:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2019-10-14 21:48:52,503 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2019-10-14 21:48:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,503 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2019-10-14 21:48:52,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2019-10-14 21:48:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:52,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,506 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 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, 1, 1] [2019-10-14 21:48:52,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,710 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1340791648, now seen corresponding path program 4 times [2019-10-14 21:48:52,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945558895] [2019-10-14 21:48:52,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,719 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626130583] [2019-10-14 21:48:52,720 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 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 [2019-10-14 21:48:52,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:52,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:52,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,900 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:48:52,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:52,908 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:52,908 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:52,909 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-14 21:48:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:48:52,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945558895] [2019-10-14 21:48:52,941 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626130583] [2019-10-14 21:48:52,941 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:52,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:48:52,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992349117] [2019-10-14 21:48:52,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:52,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:52,945 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 6 states. [2019-10-14 21:48:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,029 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2019-10-14 21:48:53,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:53,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-10-14 21:48:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,032 INFO L225 Difference]: With dead ends: 180 [2019-10-14 21:48:53,033 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:48:53,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:48:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2019-10-14 21:48:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 21:48:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-10-14 21:48:53,050 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 73 [2019-10-14 21:48:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,052 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-10-14 21:48:53,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-10-14 21:48:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:53,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,056 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 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, 1, 1, 1] [2019-10-14 21:48:53,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,260 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1588938142, now seen corresponding path program 1 times [2019-10-14 21:48:53,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274764324] [2019-10-14 21:48:53,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,271 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457734418] [2019-10-14 21:48:53,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:48:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:53,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:48:53,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274764324] [2019-10-14 21:48:53,401 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457734418] [2019-10-14 21:48:53,401 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:53,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:53,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464047047] [2019-10-14 21:48:53,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:53,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:53,404 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 8 states. [2019-10-14 21:48:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,523 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2019-10-14 21:48:53,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:48:53,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-10-14 21:48:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,525 INFO L225 Difference]: With dead ends: 194 [2019-10-14 21:48:53,525 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:48:53,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:48:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2019-10-14 21:48:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 21:48:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2019-10-14 21:48:53,554 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 73 [2019-10-14 21:48:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,555 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2019-10-14 21:48:53,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2019-10-14 21:48:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:48:53,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,557 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 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, 1, 1, 1] [2019-10-14 21:48:53,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,761 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 373177058, now seen corresponding path program 2 times [2019-10-14 21:48:53,762 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299071343] [2019-10-14 21:48:53,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,770 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539443211] [2019-10-14 21:48:53,770 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:53,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:53,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:48:53,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299071343] [2019-10-14 21:48:53,928 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539443211] [2019-10-14 21:48:53,929 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:53,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:53,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444888170] [2019-10-14 21:48:53,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:53,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:53,930 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 9 states. [2019-10-14 21:48:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:54,052 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2019-10-14 21:48:54,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:54,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-10-14 21:48:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:54,054 INFO L225 Difference]: With dead ends: 216 [2019-10-14 21:48:54,054 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 21:48:54,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 21:48:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-10-14 21:48:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:48:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2019-10-14 21:48:54,069 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 81 [2019-10-14 21:48:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:54,070 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2019-10-14 21:48:54,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2019-10-14 21:48:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:48:54,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:54,071 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 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, 1, 1, 1] [2019-10-14 21:48:54,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,275 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1259869406, now seen corresponding path program 3 times [2019-10-14 21:48:54,275 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358777613] [2019-10-14 21:48:54,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,284 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290041302] [2019-10-14 21:48:54,284 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:48:54,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:54,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:54,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-14 21:48:54,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358777613] [2019-10-14 21:48:54,618 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:54,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290041302] [2019-10-14 21:48:54,619 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:54,619 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:48:54,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600353808] [2019-10-14 21:48:54,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:48:54,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:48:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:54,620 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2019-10-14 21:48:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:54,766 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2019-10-14 21:48:54,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:48:54,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2019-10-14 21:48:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:54,768 INFO L225 Difference]: With dead ends: 238 [2019-10-14 21:48:54,768 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:48:54,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:48:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-10-14 21:48:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:48:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2019-10-14 21:48:54,781 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 89 [2019-10-14 21:48:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:54,782 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2019-10-14 21:48:54,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:48:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2019-10-14 21:48:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:48:54,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:54,783 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 2, 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, 1, 1, 1] [2019-10-14 21:48:54,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,991 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2135024862, now seen corresponding path program 4 times [2019-10-14 21:48:54,992 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276780869] [2019-10-14 21:48:54,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,999 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173394905] [2019-10-14 21:48:55,000 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 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 [2019-10-14 21:48:55,061 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:55,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:55,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-14 21:48:55,066 INFO L279 TraceCheckSpWp]: Computing forward predicates...