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-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:08,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:08,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:08,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:08,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:08,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:08,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:08,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:08,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:08,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:08,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:08,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:08,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:08,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:08,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:08,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:08,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:08,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:08,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:08,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:08,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:08,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:08,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:08,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:08,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:08,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:08,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:08,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:08,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:08,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:08,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:08,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:08,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:08,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:08,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:08,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:08,868 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 21:45:08,883 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:08,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:08,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:08,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:08,885 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:08,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:08,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:08,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:08,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:08,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:08,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:08,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:08,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:08,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:08,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:08,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:08,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:08,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:08,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:08,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:08,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:08,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:08,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:08,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:09,198 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:09,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:09,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:09,217 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:09,218 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:09,218 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-10-14 21:45:09,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3333fd73d/75560cc3d79c48efb47cc5db9093c9ef/FLAGe6b1c7ac0 [2019-10-14 21:45:09,739 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:09,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-10-14 21:45:09,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3333fd73d/75560cc3d79c48efb47cc5db9093c9ef/FLAGe6b1c7ac0 [2019-10-14 21:45:10,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3333fd73d/75560cc3d79c48efb47cc5db9093c9ef [2019-10-14 21:45:10,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:10,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:10,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:10,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:10,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:10,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47fbaaba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10, skipping insertion in model container [2019-10-14 21:45:10,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,171 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:10,191 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:10,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:10,385 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:10,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:10,425 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:10,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10 WrapperNode [2019-10-14 21:45:10,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:10,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:10,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:10,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:10,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (1/1) ... [2019-10-14 21:45:10,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:10,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:10,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:10,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:10,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (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 21:45:10,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:10,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:10,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:10,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:10,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:10,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:10,934 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:10,934 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:45:10,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:10 BoogieIcfgContainer [2019-10-14 21:45:10,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:10,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:10,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:10,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:10" (1/3) ... [2019-10-14 21:45:10,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ced8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:10, skipping insertion in model container [2019-10-14 21:45:10,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:10" (2/3) ... [2019-10-14 21:45:10,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ced8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:10, skipping insertion in model container [2019-10-14 21:45:10,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:10" (3/3) ... [2019-10-14 21:45:10,957 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2019-10-14 21:45:10,973 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:10,980 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:10,991 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:11,017 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:11,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:11,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:11,017 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:11,017 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:11,017 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:11,017 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:11,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:45:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:45:11,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,043 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2019-10-14 21:45:11,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49791410] [2019-10-14 21:45:11,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,228 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 21:45:11,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49791410] [2019-10-14 21:45:11,230 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:11,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:11,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559593812] [2019-10-14 21:45:11,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:11,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:11,255 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:45:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,427 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2019-10-14 21:45:11,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:11,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-14 21:45:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,441 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:45:11,442 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:45:11,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:45:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:45:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:45:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:45:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-14 21:45:11,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-10-14 21:45:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,488 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-14 21:45:11,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-14 21:45:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:45:11,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,490 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,491 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2019-10-14 21:45:11,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900743491] [2019-10-14 21:45:11,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,580 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 21:45:11,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900743491] [2019-10-14 21:45:11,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:11,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:11,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090321336] [2019-10-14 21:45:11,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:11,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:11,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:11,587 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-14 21:45:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,712 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-14 21:45:11,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:11,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:45:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,714 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:45:11,714 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:45:11,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:45:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:45:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:45:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:45:11,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-14 21:45:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,725 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:45:11,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:45:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:11,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,727 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,727 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2019-10-14 21:45:11,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594527741] [2019-10-14 21:45:11,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:11,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594527741] [2019-10-14 21:45:11,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860370664] [2019-10-14 21:45:11,814 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 21:45:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:11,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:11,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:11,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:11,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531716990] [2019-10-14 21:45:11,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:11,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:11,932 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-10-14 21:45:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,096 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-10-14 21:45:12,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:12,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-10-14 21:45:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,100 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:45:12,100 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:45:12,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:45:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:45:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:45:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 21:45:12,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2019-10-14 21:45:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,109 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 21:45:12,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 21:45:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:12,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,111 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2019-10-14 21:45:12,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040672561] [2019-10-14 21:45:12,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:45:12,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040672561] [2019-10-14 21:45:12,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805667584] [2019-10-14 21:45:12,472 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 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 21:45:12,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:12,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:12,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:45:12,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:12,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294338259] [2019-10-14 21:45:12,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:12,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:12,544 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2019-10-14 21:45:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,682 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-10-14 21:45:12,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:12,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-14 21:45:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,684 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:45:12,684 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:45:12,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:45:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:45:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:45:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-14 21:45:12,697 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2019-10-14 21:45:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,697 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-14 21:45:12,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-14 21:45:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:45:12,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,699 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,900 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,900 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2019-10-14 21:45:12,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809478872] [2019-10-14 21:45:12,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:13,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809478872] [2019-10-14 21:45:13,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086952910] [2019-10-14 21:45:13,040 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 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 21:45:13,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:13,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:13,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:13,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423746605] [2019-10-14 21:45:13,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:13,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:13,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:13,160 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 8 states. [2019-10-14 21:45:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,300 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2019-10-14 21:45:13,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:13,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-14 21:45:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,302 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:45:13,302 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:13,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-10-14 21:45:13,311 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2019-10-14 21:45:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,312 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-10-14 21:45:13,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-10-14 21:45:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:13,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,314 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:13,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,525 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2019-10-14 21:45:13,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054852409] [2019-10-14 21:45:13,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:45:13,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054852409] [2019-10-14 21:45:13,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455856073] [2019-10-14 21:45:13,676 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 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 21:45:13,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:13,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:45:13,765 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:13,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937621688] [2019-10-14 21:45:13,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:13,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:13,768 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 9 states. [2019-10-14 21:45:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,957 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-10-14 21:45:13,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:13,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-14 21:45:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,959 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:45:13,959 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:45:13,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:45:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-14 21:45:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:45:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-14 21:45:13,968 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2019-10-14 21:45:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,968 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-14 21:45:13,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-14 21:45:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:45:13,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,970 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:14,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,177 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2019-10-14 21:45:14,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:14,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172124125] [2019-10-14 21:45:14,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:45:14,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172124125] [2019-10-14 21:45:14,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269996672] [2019-10-14 21:45:14,297 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 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 21:45:19,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:19,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:19,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:19,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:45:19,881 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:19,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:19,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945189900] [2019-10-14 21:45:19,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:19,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:19,885 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 10 states. [2019-10-14 21:45:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:20,038 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2019-10-14 21:45:20,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:20,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-10-14 21:45:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:20,040 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:45:20,040 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:45:20,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:45:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 21:45:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-14 21:45:20,059 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2019-10-14 21:45:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:20,060 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-14 21:45:20,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-14 21:45:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:45:20,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:20,066 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:20,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:20,275 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:20,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2019-10-14 21:45:20,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:20,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680126719] [2019-10-14 21:45:20,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:20,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:20,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:20,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680126719] [2019-10-14 21:45:20,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996647674] [2019-10-14 21:45:20,386 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:45:21,150 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:21,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:21,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:21,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:21,194 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:21,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:21,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372944254] [2019-10-14 21:45:21,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:21,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,196 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 11 states. [2019-10-14 21:45:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:21,368 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-10-14 21:45:21,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:21,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-10-14 21:45:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:21,370 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:45:21,370 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:45:21,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:45:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-14 21:45:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:45:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-10-14 21:45:21,378 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2019-10-14 21:45:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:21,379 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-10-14 21:45:21,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-10-14 21:45:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:45:21,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:21,380 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:21,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,583 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2019-10-14 21:45:21,584 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:21,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486680477] [2019-10-14 21:45:21,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:21,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:45:21,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486680477] [2019-10-14 21:45:21,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003437252] [2019-10-14 21:45:21,709 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:21,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:21,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:45:21,815 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:21,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:21,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002030450] [2019-10-14 21:45:21,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:21,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:21,817 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 12 states. [2019-10-14 21:45:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:22,071 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-10-14 21:45:22,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:22,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-14 21:45:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:22,072 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:45:22,072 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:22,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-14 21:45:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:45:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-10-14 21:45:22,082 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-10-14 21:45:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:22,083 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-10-14 21:45:22,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-10-14 21:45:22,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:45:22,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,084 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:22,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,291 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:22,291 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2019-10-14 21:45:22,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:22,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317745842] [2019-10-14 21:45:22,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:22,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317745842] [2019-10-14 21:45:22,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438042715] [2019-10-14 21:45:22,438 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:22,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:22,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:22,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:22,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:22,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:22,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:22,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376426937] [2019-10-14 21:45:22,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:22,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:22,585 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 13 states. [2019-10-14 21:45:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:22,810 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2019-10-14 21:45:22,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:22,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-14 21:45:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:22,812 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:45:22,813 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:45:22,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:45:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-14 21:45:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:45:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-10-14 21:45:22,841 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2019-10-14 21:45:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:22,842 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-10-14 21:45:22,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-10-14 21:45:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:45:22,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,849 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,054 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2019-10-14 21:45:23,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,054 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266388406] [2019-10-14 21:45:23,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:45:23,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266388406] [2019-10-14 21:45:23,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064685282] [2019-10-14 21:45:23,195 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:32,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:32,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:45:32,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:45:32,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:32,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:45:32,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854363483] [2019-10-14 21:45:32,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:45:32,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:45:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:32,257 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 14 states. [2019-10-14 21:45:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:32,475 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-10-14 21:45:32,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:45:32,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-10-14 21:45:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:32,476 INFO L225 Difference]: With dead ends: 154 [2019-10-14 21:45:32,477 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:45:32,477 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:45:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-14 21:45:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:45:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-10-14 21:45:32,487 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2019-10-14 21:45:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:32,487 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-10-14 21:45:32,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:45:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-10-14 21:45:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:45:32,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:32,489 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:32,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,698 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2019-10-14 21:45:32,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:32,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345025307] [2019-10-14 21:45:32,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 21:45:32,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345025307] [2019-10-14 21:45:32,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556446389] [2019-10-14 21:45:32,906 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:32,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:32,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:33,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 21:45:33,048 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:33,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:33,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429694109] [2019-10-14 21:45:33,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:33,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:33,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:33,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:33,058 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 15 states. [2019-10-14 21:45:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:33,297 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-10-14 21:45:33,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:33,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2019-10-14 21:45:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:33,298 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:45:33,298 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 21:45:33,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 21:45:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-14 21:45:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 21:45:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-10-14 21:45:33,324 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2019-10-14 21:45:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:33,324 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-10-14 21:45:33,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-10-14 21:45:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:45:33,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:33,326 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:33,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:33,532 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2019-10-14 21:45:33,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:33,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848594190] [2019-10-14 21:45:33,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:33,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:33,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-14 21:45:33,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848594190] [2019-10-14 21:45:33,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957855770] [2019-10-14 21:45:33,683 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true