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/nla-digbench/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:21,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:21,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:21,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:21,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:21,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:21,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:21,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:21,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:21,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:21,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:21,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:21,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:21,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:21,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:21,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:21,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:21,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:21,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:21,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:21,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:21,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:21,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:21,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:21,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:21,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:21,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:21,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:21,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:21,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:21,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:21,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:21,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:21,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:21,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:21,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:21,838 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 23:17:21,851 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:21,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:21,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:21,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:21,853 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:21,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:21,853 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:21,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:21,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:21,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:21,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:21,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:21,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:21,855 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:21,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:21,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:21,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:21,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:21,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:21,856 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:21,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:21,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:21,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:21,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:21,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:21,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:21,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:21,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:21,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:22,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:22,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:22,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:22,188 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:22,189 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:22,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2019-10-14 23:17:22,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d17a324/94cbba3d25c74c4c90c0880492f46674/FLAG85a9d85fa [2019-10-14 23:17:22,700 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:22,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2019-10-14 23:17:22,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d17a324/94cbba3d25c74c4c90c0880492f46674/FLAG85a9d85fa [2019-10-14 23:17:23,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d17a324/94cbba3d25c74c4c90c0880492f46674 [2019-10-14 23:17:23,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:23,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:23,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:23,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:23,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:23,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397df160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23, skipping insertion in model container [2019-10-14 23:17:23,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,085 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:23,108 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:23,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:23,290 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:23,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:23,328 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:23,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23 WrapperNode [2019-10-14 23:17:23,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:23,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:23,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:23,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:23,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (1/1) ... [2019-10-14 23:17:23,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:23,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:23,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:23,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:23,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (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 23:17:23,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:23,734 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:23,735 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:23,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:23 BoogieIcfgContainer [2019-10-14 23:17:23,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:23,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:23,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:23,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:23,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:23" (1/3) ... [2019-10-14 23:17:23,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2ead50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:23, skipping insertion in model container [2019-10-14 23:17:23,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:23" (2/3) ... [2019-10-14 23:17:23,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2ead50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:23, skipping insertion in model container [2019-10-14 23:17:23,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:23" (3/3) ... [2019-10-14 23:17:23,744 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-10-14 23:17:23,754 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:23,761 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:23,786 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:23,851 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:23,852 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:23,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:23,852 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:23,852 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:23,852 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:23,852 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:23,853 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:17:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:23,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:23,887 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:23,889 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:23,894 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-10-14 23:17:23,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:23,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666239196] [2019-10-14 23:17:23,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:23,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:24,025 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 23:17:24,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666239196] [2019-10-14 23:17:24,026 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:24,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:24,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589992307] [2019-10-14 23:17:24,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:24,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:24,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:24,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:24,042 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:17:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,061 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-10-14 23:17:24,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:24,062 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,072 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:24,072 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:17:24,075 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 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 23:17:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:17:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:17:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:17:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:17:24,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:17:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,119 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:17:24,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:17:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:24,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:24,123 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-10-14 23:17:24,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:24,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857779398] [2019-10-14 23:17:24,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:24,145 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:24,146 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821683560] [2019-10-14 23:17:24,146 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 23:17:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:24,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:24,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:24,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:24,317 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 23:17:24,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857779398] [2019-10-14 23:17:24,318 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:24,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821683560] [2019-10-14 23:17:24,320 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:24,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:24,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585713701] [2019-10-14 23:17:24,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:24,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:24,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:24,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:24,324 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:17:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,410 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:17:24,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:24,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,413 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:17:24,413 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:17:24,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:17:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 23:17:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:17:24,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-10-14 23:17:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,424 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:17:24,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:17:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:24,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,425 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:24,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:24,629 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-10-14 23:17:24,631 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:24,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576635295] [2019-10-14 23:17:24,632 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:24,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:24,641 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:24,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84593664] [2019-10-14 23:17:24,642 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 23:17:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:24,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:17:24,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:24,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:24,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576635295] [2019-10-14 23:17:24,798 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:24,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84593664] [2019-10-14 23:17:24,802 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:24,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:24,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991905139] [2019-10-14 23:17:24,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:24,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:24,804 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-10-14 23:17:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:24,904 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-14 23:17:24,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:24,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 23:17:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:24,906 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:17:24,907 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:17:24,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:17:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:17:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-14 23:17:24,915 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-10-14 23:17:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:24,916 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-14 23:17:24,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-14 23:17:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:24,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:24,917 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:25,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:25,130 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 484796766, now seen corresponding path program 1 times [2019-10-14 23:17:25,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:25,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620544961] [2019-10-14 23:17:25,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:25,151 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:25,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601181484] [2019-10-14 23:17:25,152 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 23:17:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:25,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:17:25,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:25,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:25,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620544961] [2019-10-14 23:17:25,308 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:25,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601181484] [2019-10-14 23:17:25,308 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:25,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:25,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143754259] [2019-10-14 23:17:25,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:25,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:25,311 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2019-10-14 23:17:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:25,430 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-14 23:17:25,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:25,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 23:17:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:25,432 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:17:25,432 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:17:25,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:17:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-10-14 23:17:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:17:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-14 23:17:25,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2019-10-14 23:17:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:25,440 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-14 23:17:25,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-14 23:17:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:25,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:25,442 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:25,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:25,654 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:25,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1597862285, now seen corresponding path program 2 times [2019-10-14 23:17:25,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:25,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786410063] [2019-10-14 23:17:25,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:25,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:25,664 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:25,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996930017] [2019-10-14 23:17:25,665 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 23:17:25,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:25,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:25,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:25,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:25,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:25,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786410063] [2019-10-14 23:17:25,792 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:25,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996930017] [2019-10-14 23:17:25,793 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:25,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:25,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817659770] [2019-10-14 23:17:25,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:25,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:25,795 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2019-10-14 23:17:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:25,926 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-14 23:17:25,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:25,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-14 23:17:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:25,929 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:17:25,929 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:17:25,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:17:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-10-14 23:17:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:17:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:17:25,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-10-14 23:17:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:25,946 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:17:25,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:17:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:25,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:25,951 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,152 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1655120587, now seen corresponding path program 1 times [2019-10-14 23:17:26,153 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011747865] [2019-10-14 23:17:26,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,160 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:26,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479008171] [2019-10-14 23:17:26,161 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 23:17:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:26,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:26,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:26,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:26,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011747865] [2019-10-14 23:17:26,295 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:26,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479008171] [2019-10-14 23:17:26,296 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:26,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:26,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748516795] [2019-10-14 23:17:26,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:26,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:26,298 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-10-14 23:17:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,407 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-14 23:17:26,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:26,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-14 23:17:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,409 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:17:26,409 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:17:26,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:17:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-10-14 23:17:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:17:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:17:26,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-10-14 23:17:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,418 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:17:26,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:17:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:26,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,419 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,628 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 586745035, now seen corresponding path program 2 times [2019-10-14 23:17:26,629 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565290465] [2019-10-14 23:17:26,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,637 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:26,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172386510] [2019-10-14 23:17:26,637 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 23:17:26,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:26,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:26,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:26,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:26,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:26,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565290465] [2019-10-14 23:17:26,773 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:26,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172386510] [2019-10-14 23:17:26,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:26,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:26,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65900127] [2019-10-14 23:17:26,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:26,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:26,776 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2019-10-14 23:17:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,952 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-10-14 23:17:26,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:26,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-14 23:17:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,954 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:17:26,954 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:17:26,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:17:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-14 23:17:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-10-14 23:17:26,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-10-14 23:17:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,966 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-10-14 23:17:26,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-10-14 23:17:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:26,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,967 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,171 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,172 INFO L82 PathProgramCache]: Analyzing trace with hash 644003337, now seen corresponding path program 2 times [2019-10-14 23:17:27,173 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053227129] [2019-10-14 23:17:27,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,188 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336226445] [2019-10-14 23:17:27,188 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 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 23:17:27,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:27,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:27,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:27,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:27,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:27,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053227129] [2019-10-14 23:17:27,328 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:27,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336226445] [2019-10-14 23:17:27,328 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:27,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:27,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80962331] [2019-10-14 23:17:27,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:27,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:27,330 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2019-10-14 23:17:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,431 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-10-14 23:17:27,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:27,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-14 23:17:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,433 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:17:27,433 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:17:27,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:17:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2019-10-14 23:17:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:17:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 23:17:27,441 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2019-10-14 23:17:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,441 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 23:17:27,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 23:17:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:17:27,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,443 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,647 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash -380015110, now seen corresponding path program 3 times [2019-10-14 23:17:27,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633444339] [2019-10-14 23:17:27,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,655 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812019931] [2019-10-14 23:17:27,656 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 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 23:17:27,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:27,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:27,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:27,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:27,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:17:27,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633444339] [2019-10-14 23:17:27,766 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:27,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812019931] [2019-10-14 23:17:27,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:27,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:27,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780933526] [2019-10-14 23:17:27,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:27,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:27,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:27,768 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-10-14 23:17:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,860 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-10-14 23:17:27,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:27,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-10-14 23:17:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,862 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:17:27,862 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:17:27,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:17:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-10-14 23:17:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:17:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-10-14 23:17:27,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2019-10-14 23:17:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,871 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-10-14 23:17:27,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-10-14 23:17:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:17:27,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,873 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,078 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,079 INFO L82 PathProgramCache]: Analyzing trace with hash -322756808, now seen corresponding path program 3 times [2019-10-14 23:17:28,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9949763] [2019-10-14 23:17:28,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,084 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761522090] [2019-10-14 23:17:28,085 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 23:17:28,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:28,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:28,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:17:28,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9949763] [2019-10-14 23:17:28,261 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761522090] [2019-10-14 23:17:28,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:28,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888044252] [2019-10-14 23:17:28,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:28,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:28,263 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2019-10-14 23:17:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:28,384 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-10-14 23:17:28,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:28,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-10-14 23:17:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:28,390 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:17:28,390 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 23:17:28,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 23:17:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2019-10-14 23:17:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-10-14 23:17:28,399 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2019-10-14 23:17:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,399 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-10-14 23:17:28,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-10-14 23:17:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:17:28,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:28,400 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,612 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1391132360, now seen corresponding path program 4 times [2019-10-14 23:17:28,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926610198] [2019-10-14 23:17:28,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,620 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169046862] [2019-10-14 23:17:28,620 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 23:17:28,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:28,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:28,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:31,628 WARN L191 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-10-14 23:17:39,699 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2019-10-14 23:17:49,882 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 30 [2019-10-14 23:17:49,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 10 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:17:52,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926610198] [2019-10-14 23:17:52,123 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:52,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169046862] [2019-10-14 23:17:52,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:52,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:52,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794247953] [2019-10-14 23:17:52,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:52,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=61, Unknown=10, NotChecked=0, Total=90 [2019-10-14 23:17:52,125 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states.