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/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:48,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:48,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:48,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:48,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:48,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:48,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:48,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:48,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:48,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:48,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:48,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:48,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:48,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:48,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:48,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:48,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:48,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:48,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:48,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:48,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:48,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:48,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:48,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:48,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:48:48,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:48,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:48,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:48,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:48,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:48,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:48,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:48,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:48,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:48,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:48,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:48,807 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 21:48:48,820 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:48,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:48,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:48,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:48,821 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:48,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:48,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:48,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:48,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:48,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:48,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:48,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:48,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:48,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:48,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:48,824 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:48,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:48,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:48,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:48,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:48,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:48,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:48,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:48,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:49,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:49,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:49,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:49,156 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:49,156 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:49,157 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-10-14 21:48:49,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e3eb272e/9adacf870fd648f29daf313a33e67dea/FLAGd93754453 [2019-10-14 21:48:49,608 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:49,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-2-u.c [2019-10-14 21:48:49,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e3eb272e/9adacf870fd648f29daf313a33e67dea/FLAGd93754453 [2019-10-14 21:48:49,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e3eb272e/9adacf870fd648f29daf313a33e67dea [2019-10-14 21:48:49,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:49,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:49,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:49,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:49,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:50,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:49" (1/1) ... [2019-10-14 21:48:50,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de122ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50, skipping insertion in model container [2019-10-14 21:48:50,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:49" (1/1) ... [2019-10-14 21:48:50,010 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:50,031 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:50,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:50,261 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:50,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:50,414 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:50,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50 WrapperNode [2019-10-14 21:48:50,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:50,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:50,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:50,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:50,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:50,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:50,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:50,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:50,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (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 21:48:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:50,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:50,812 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:50,812 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:48:50,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:50 BoogieIcfgContainer [2019-10-14 21:48:50,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:50,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:50,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:50,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:50,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:49" (1/3) ... [2019-10-14 21:48:50,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e52e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:50, skipping insertion in model container [2019-10-14 21:48:50,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50" (2/3) ... [2019-10-14 21:48:50,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e52e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:50, skipping insertion in model container [2019-10-14 21:48:50,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:50" (3/3) ... [2019-10-14 21:48:50,821 INFO L109 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2019-10-14 21:48:50,832 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:50,839 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:50,861 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:50,884 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:50,884 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:50,885 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:50,885 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:50,885 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:50,885 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:50,885 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:50,885 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:48:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:48:50,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:50,911 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:50,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-10-14 21:48:50,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:50,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562845676] [2019-10-14 21:48:50,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:50,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,003 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330967467] [2019-10-14 21:48:51,004 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 21:48:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:51,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,121 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 21:48:51,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562845676] [2019-10-14 21:48:51,122 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330967467] [2019-10-14 21:48:51,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:51,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:51,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737964759] [2019-10-14 21:48:51,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:51,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:51,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:51,141 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:48:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:51,215 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-10-14 21:48:51,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:51,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:48:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:51,224 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:48:51,224 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:48:51,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:48:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-14 21:48:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:48:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-14 21:48:51,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-10-14 21:48:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:51,262 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-14 21:48:51,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-14 21:48:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:48:51,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,263 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:51,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:51,465 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-10-14 21:48:51,467 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712821408] [2019-10-14 21:48:51,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,478 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3548748] [2019-10-14 21:48:51,478 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 21:48:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:51,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,579 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 21:48:51,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712821408] [2019-10-14 21:48:51,579 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3548748] [2019-10-14 21:48:51,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:51,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:51,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901027100] [2019-10-14 21:48:51,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:51,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:51,584 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-14 21:48:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:51,659 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-10-14 21:48:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:51,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:48:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:51,662 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:48:51,663 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:48:51,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:48:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-10-14 21:48:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:48:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-14 21:48:51,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-10-14 21:48:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:51,677 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-14 21:48:51,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-14 21:48:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:51,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,678 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 21:48:51,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:51,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-10-14 21:48:51,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541564493] [2019-10-14 21:48:51,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,900 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894283680] [2019-10-14 21:48:51,901 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 21:48:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:51,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:52,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541564493] [2019-10-14 21:48:52,004 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894283680] [2019-10-14 21:48:52,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:52,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:52,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112630927] [2019-10-14 21:48:52,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:52,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:52,008 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-10-14 21:48:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,112 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-10-14 21:48:52,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:52,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:48:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,115 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:48:52,115 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:48:52,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:48:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-14 21:48:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:48:52,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-10-14 21:48:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,138 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:48:52,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:48:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:48:52,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,139 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] [2019-10-14 21:48:52,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,343 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-10-14 21:48:52,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786295707] [2019-10-14 21:48:52,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,359 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575559346] [2019-10-14 21:48:52,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:52,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:52,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:48:52,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786295707] [2019-10-14 21:48:52,425 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575559346] [2019-10-14 21:48:52,425 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:52,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:52,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195143821] [2019-10-14 21:48:52,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:52,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:52,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:52,427 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-10-14 21:48:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,495 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-14 21:48:52,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:52,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:48:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,496 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:48:52,497 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:48:52,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:48:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-10-14 21:48:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:48:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-14 21:48:52,507 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-10-14 21:48:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,508 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-14 21:48:52,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-14 21:48:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:48:52,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,510 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] [2019-10-14 21:48:52,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,717 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-10-14 21:48:52,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044304368] [2019-10-14 21:48:52,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,727 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782072932] [2019-10-14 21:48:52,728 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 21:48:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:52,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:48:52,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044304368] [2019-10-14 21:48:52,824 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782072932] [2019-10-14 21:48:52,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:52,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:52,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766421291] [2019-10-14 21:48:52,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:52,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:52,827 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-10-14 21:48:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,953 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-10-14 21:48:52,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:52,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 21:48:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,956 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:48:52,956 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:48:52,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 21:48:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:48:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-10-14 21:48:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:48:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-14 21:48:52,977 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-10-14 21:48:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,978 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-14 21:48:52,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-14 21:48:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:48:52,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,983 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] [2019-10-14 21:48:53,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,184 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-10-14 21:48:53,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853696550] [2019-10-14 21:48:53,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,192 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320951573] [2019-10-14 21:48:53,193 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 21:48:53,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:53,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:53,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:48:53,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853696550] [2019-10-14 21:48:53,337 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320951573] [2019-10-14 21:48:53,338 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:53,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:53,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690319847] [2019-10-14 21:48:53,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:53,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:53,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:53,340 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-10-14 21:48:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,479 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-10-14 21:48:53,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:53,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-14 21:48:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,481 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:48:53,481 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:48:53,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 21:48:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:48:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-14 21:48:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:48:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-10-14 21:48:53,498 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-10-14 21:48:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,498 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-10-14 21:48:53,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-10-14 21:48:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:48:53,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,501 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] [2019-10-14 21:48:53,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,706 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-10-14 21:48:53,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364378705] [2019-10-14 21:48:53,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,716 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801656239] [2019-10-14 21:48:53,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:53,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:53,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:48:53,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364378705] [2019-10-14 21:48:53,800 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801656239] [2019-10-14 21:48:53,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:53,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:48:53,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649102276] [2019-10-14 21:48:53,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:53,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:53,802 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-10-14 21:48:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,855 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-10-14 21:48:53,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:53,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-14 21:48:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,857 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:48:53,857 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:48:53,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 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 21:48:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:48:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-10-14 21:48:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:48:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-10-14 21:48:53,876 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-10-14 21:48:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,877 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-10-14 21:48:53,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-10-14 21:48:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:53,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,879 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:54,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,091 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-10-14 21:48:54,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499300577] [2019-10-14 21:48:54,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,102 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536601767] [2019-10-14 21:48:54,103 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:54,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:54,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:54,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:48:54,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499300577] [2019-10-14 21:48:54,236 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:54,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536601767] [2019-10-14 21:48:54,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:54,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:54,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622153139] [2019-10-14 21:48:54,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:54,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:54,238 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-10-14 21:48:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:54,460 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-10-14 21:48:54,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:48:54,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-14 21:48:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:54,463 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:48:54,463 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:48:54,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:48:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:48:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-10-14 21:48:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:48:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-10-14 21:48:54,492 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-10-14 21:48:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:54,492 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-10-14 21:48:54,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-10-14 21:48:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:48:54,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:54,496 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:54,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,696 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-10-14 21:48:54,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733990684] [2019-10-14 21:48:54,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,713 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143200725] [2019-10-14 21:48:54,714 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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