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-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:05,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:05,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:05,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:05,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:05,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:05,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:05,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:05,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:05,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:05,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:05,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:05,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:05,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:05,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:05,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:05,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:05,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:05,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:05,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:05,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:05,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:05,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:05,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:05,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:05,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:05,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:05,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:05,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:05,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:05,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:05,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:05,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:05,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:05,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:05,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:05,875 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 21:41:05,893 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:05,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:05,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:05,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:05,896 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:05,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:05,896 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:05,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:05,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:05,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:05,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:05,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:05,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:05,899 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:05,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:05,899 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:05,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:05,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:05,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:05,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:05,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:05,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:05,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:05,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:05,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:05,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:05,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:05,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:05,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:06,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:06,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:06,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:06,253 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:06,253 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:06,254 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2019-10-14 21:41:06,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc7c2247/a9c2da0b8d13439ca9ff703a8550152c/FLAGa46601be3 [2019-10-14 21:41:06,839 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:06,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c [2019-10-14 21:41:06,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc7c2247/a9c2da0b8d13439ca9ff703a8550152c/FLAGa46601be3 [2019-10-14 21:41:07,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc7c2247/a9c2da0b8d13439ca9ff703a8550152c [2019-10-14 21:41:07,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:07,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:07,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:07,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:07,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:07,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a21fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07, skipping insertion in model container [2019-10-14 21:41:07,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,226 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:07,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:07,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:07,482 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:07,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:07,622 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:07,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07 WrapperNode [2019-10-14 21:41:07,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:07,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:07,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:07,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:07,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (1/1) ... [2019-10-14 21:41:07,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:07,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:07,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:07,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:07,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (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 21:41:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-14 21:41:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:08,097 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:08,097 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:41:08,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:08 BoogieIcfgContainer [2019-10-14 21:41:08,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:08,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:08,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:08,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:08,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:07" (1/3) ... [2019-10-14 21:41:08,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67269616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:08, skipping insertion in model container [2019-10-14 21:41:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:07" (2/3) ... [2019-10-14 21:41:08,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67269616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:08, skipping insertion in model container [2019-10-14 21:41:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:08" (3/3) ... [2019-10-14 21:41:08,106 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2019-10-14 21:41:08,114 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:08,121 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:08,133 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:08,156 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:08,156 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:08,156 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:08,156 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:08,157 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:08,157 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:08,157 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:08,157 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-10-14 21:41:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:08,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,182 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, 1, 1, 1] [2019-10-14 21:41:08,184 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -298961335, now seen corresponding path program 1 times [2019-10-14 21:41:08,196 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445885006] [2019-10-14 21:41:08,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,376 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 21:41:08,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445885006] [2019-10-14 21:41:08,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:08,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:08,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49358685] [2019-10-14 21:41:08,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:08,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:08,409 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2019-10-14 21:41:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:08,595 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2019-10-14 21:41:08,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:08,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:41:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:08,607 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:41:08,607 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:41:08,611 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 21:41:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:41:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:41:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:41:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-14 21:41:08,659 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2019-10-14 21:41:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:08,660 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-14 21:41:08,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-14 21:41:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:08,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,662 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, 1, 1, 1] [2019-10-14 21:41:08,663 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,663 INFO L82 PathProgramCache]: Analyzing trace with hash 351831333, now seen corresponding path program 1 times [2019-10-14 21:41:08,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-14 21:41:08,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,815 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 21:41:08,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-14 21:41:08,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:08,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:08,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764192136] [2019-10-14 21:41:08,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:08,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:08,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:08,819 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 6 states. [2019-10-14 21:41:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,057 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2019-10-14 21:41:09,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:09,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 21:41:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,061 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:41:09,061 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:09,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 21:41:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:41:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2019-10-14 21:41:09,083 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 32 [2019-10-14 21:41:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,083 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2019-10-14 21:41:09,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2019-10-14 21:41:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:41:09,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,088 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, 1, 1, 1, 1, 1] [2019-10-14 21:41:09,089 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash 615337315, now seen corresponding path program 1 times [2019-10-14 21:41:09,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-14 21:41:09,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:09,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-14 21:41:09,231 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:09,231 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:09,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191373541] [2019-10-14 21:41:09,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:09,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:09,234 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2019-10-14 21:41:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,375 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2019-10-14 21:41:09,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:09,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-14 21:41:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,377 INFO L225 Difference]: With dead ends: 119 [2019-10-14 21:41:09,378 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:09,378 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 21:41:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:41:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:41:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-14 21:41:09,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2019-10-14 21:41:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,388 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-14 21:41:09,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-14 21:41:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:41:09,390 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,390 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:09,391 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1838268449, now seen corresponding path program 1 times [2019-10-14 21:41:09,391 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711184398] [2019-10-14 21:41:09,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:09,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711184398] [2019-10-14 21:41:09,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:09,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:09,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631205054] [2019-10-14 21:41:09,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:09,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:09,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:09,493 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2019-10-14 21:41:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,690 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2019-10-14 21:41:09,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:09,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-14 21:41:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,691 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:41:09,692 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:41:09,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:41:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:41:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2019-10-14 21:41:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:41:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-10-14 21:41:09,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 36 [2019-10-14 21:41:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,702 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-10-14 21:41:09,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-10-14 21:41:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:41:09,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,704 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, 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 21:41:09,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1356508047, now seen corresponding path program 1 times [2019-10-14 21:41:09,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490456691] [2019-10-14 21:41:09,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:09,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490456691] [2019-10-14 21:41:09,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912157225] [2019-10-14 21:41:09,824 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 21:41:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:41:09,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:41:09,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116201359] [2019-10-14 21:41:09,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:09,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:09,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:09,987 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 8 states. [2019-10-14 21:41:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:10,323 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2019-10-14 21:41:10,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:41:10,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2019-10-14 21:41:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:10,342 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:41:10,342 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:41:10,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:41:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 21:41:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-10-14 21:41:10,353 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 54 [2019-10-14 21:41:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:10,353 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-10-14 21:41:10,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-10-14 21:41:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:10,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:10,356 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:10,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,561 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1043072633, now seen corresponding path program 2 times [2019-10-14 21:41:10,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:10,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607096038] [2019-10-14 21:41:10,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:12,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607096038] [2019-10-14 21:41:12,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935358448] [2019-10-14 21:41:12,164 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 21:41:12,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:12,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:12,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 96 conjunts are in the unsatisfiable core [2019-10-14 21:41:12,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:12,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:13,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:13,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 31 [2019-10-14 21:41:13,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295915832] [2019-10-14 21:41:13,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:41:13,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:13,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:41:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:41:13,053 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 31 states. [2019-10-14 21:41:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:14,780 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2019-10-14 21:41:14,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:41:14,781 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2019-10-14 21:41:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:14,784 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:41:14,784 INFO L226 Difference]: Without dead ends: 134 [2019-10-14 21:41:14,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 60 SyntacticMatches, 36 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-14 21:41:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2019-10-14 21:41:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:41:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2019-10-14 21:41:14,805 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2019-10-14 21:41:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:14,806 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2019-10-14 21:41:14,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:41:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2019-10-14 21:41:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:41:14,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:14,814 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:15,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:15,018 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash 867658167, now seen corresponding path program 3 times [2019-10-14 21:41:15,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:15,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123165369] [2019-10-14 21:41:15,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:41:15,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123165369] [2019-10-14 21:41:15,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060227205] [2019-10-14 21:41:15,160 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 21:41:15,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:41:15,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:15,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:15,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:41:15,343 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:15,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 21:41:15,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784986300] [2019-10-14 21:41:15,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:41:15,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:41:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:15,346 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 16 states. [2019-10-14 21:41:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:16,254 INFO L93 Difference]: Finished difference Result 346 states and 400 transitions. [2019-10-14 21:41:16,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:41:16,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:41:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:16,257 INFO L225 Difference]: With dead ends: 346 [2019-10-14 21:41:16,257 INFO L226 Difference]: Without dead ends: 171 [2019-10-14 21:41:16,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-14 21:41:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 145. [2019-10-14 21:41:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:41:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2019-10-14 21:41:16,289 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 78 [2019-10-14 21:41:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:16,292 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2019-10-14 21:41:16,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:41:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2019-10-14 21:41:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 21:41:16,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:16,294 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:16,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,496 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 230738229, now seen corresponding path program 4 times [2019-10-14 21:41:16,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:16,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459721976] [2019-10-14 21:41:16,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:41:16,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459721976] [2019-10-14 21:41:16,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964385625] [2019-10-14 21:41:16,602 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 21:41:16,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:16,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:16,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:16,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 21:41:16,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:16,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 21:41:16,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946991009] [2019-10-14 21:41:16,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:41:16,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:41:16,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:16,795 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand 16 states. [2019-10-14 21:41:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:17,518 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-14 21:41:17,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:17,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2019-10-14 21:41:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:17,520 INFO L225 Difference]: With dead ends: 162 [2019-10-14 21:41:17,520 INFO L226 Difference]: Without dead ends: 109 [2019-10-14 21:41:17,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:41:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-14 21:41:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2019-10-14 21:41:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:41:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-14 21:41:17,531 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2019-10-14 21:41:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:17,531 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-14 21:41:17,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:41:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-14 21:41:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:41:17,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:17,534 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:17,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:17,743 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1937623581, now seen corresponding path program 5 times [2019-10-14 21:41:17,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:17,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926165106] [2019-10-14 21:41:17,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,821 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 14 [2019-10-14 21:41:18,978 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2019-10-14 21:41:19,184 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 34 [2019-10-14 21:41:19,413 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2019-10-14 21:41:19,627 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2019-10-14 21:41:19,856 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2019-10-14 21:41:20,053 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-10-14 21:41:20,235 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 27 [2019-10-14 21:41:20,433 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2019-10-14 21:41:20,623 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2019-10-14 21:41:20,825 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2019-10-14 21:41:21,036 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 31 [2019-10-14 21:41:21,203 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2019-10-14 21:41:21,365 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2019-10-14 21:41:21,516 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2019-10-14 21:41:21,963 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2019-10-14 21:41:22,149 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2019-10-14 21:41:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:24,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926165106] [2019-10-14 21:41:24,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256578258] [2019-10-14 21:41:24,793 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 21:41:25,291 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:25,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:25,296 WARN L254 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 137 conjunts are in the unsatisfiable core [2019-10-14 21:41:25,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:25,376 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:41:25,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,383 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:25,384 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,384 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2019-10-14 21:41:25,415 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:41:25,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,423 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:25,423 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,424 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2019-10-14 21:41:25,458 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:41:25,458 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,466 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:25,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:25,468 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-10-14 21:41:26,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:26,560 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:26,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 19] total 56 [2019-10-14 21:41:26,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996293091] [2019-10-14 21:41:26,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-14 21:41:26,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-14 21:41:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2726, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 21:41:26,563 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 56 states. [2019-10-14 21:41:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:31,640 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2019-10-14 21:41:31,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:41:31,641 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 98 [2019-10-14 21:41:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:31,644 INFO L225 Difference]: With dead ends: 189 [2019-10-14 21:41:31,644 INFO L226 Difference]: Without dead ends: 184 [2019-10-14 21:41:31,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 74 SyntacticMatches, 61 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3125 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=710, Invalid=5452, Unknown=0, NotChecked=0, Total=6162 [2019-10-14 21:41:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-14 21:41:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2019-10-14 21:41:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-10-14 21:41:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2019-10-14 21:41:31,661 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2019-10-14 21:41:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:31,662 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2019-10-14 21:41:31,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-14 21:41:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2019-10-14 21:41:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 21:41:31,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:31,683 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:31,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:31,888 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:31,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1291204257, now seen corresponding path program 6 times [2019-10-14 21:41:31,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:31,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969723100] [2019-10-14 21:41:31,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:31,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:31,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:41:32,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969723100] [2019-10-14 21:41:32,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979722386] [2019-10-14 21:41:32,051 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 21:41:32,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:41:32,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:32,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:32,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:41:32,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:32,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-10-14 21:41:32,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355914422] [2019-10-14 21:41:32,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:41:32,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:41:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:32,270 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand 20 states. [2019-10-14 21:41:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:33,440 INFO L93 Difference]: Finished difference Result 440 states and 494 transitions. [2019-10-14 21:41:33,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:41:33,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2019-10-14 21:41:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:33,443 INFO L225 Difference]: With dead ends: 440 [2019-10-14 21:41:33,444 INFO L226 Difference]: Without dead ends: 209 [2019-10-14 21:41:33,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:41:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-10-14 21:41:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2019-10-14 21:41:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-14 21:41:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2019-10-14 21:41:33,456 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 100 [2019-10-14 21:41:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:33,456 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2019-10-14 21:41:33,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:41:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2019-10-14 21:41:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:41:33,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:33,458 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:33,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:33,660 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:33,661 INFO L82 PathProgramCache]: Analyzing trace with hash -138218593, now seen corresponding path program 7 times [2019-10-14 21:41:33,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:33,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372419499] [2019-10-14 21:41:33,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:33,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:33,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-14 21:41:33,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372419499] [2019-10-14 21:41:33,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621756113] [2019-10-14 21:41:33,817 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 21:41:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:33,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:33,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-14 21:41:34,094 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:34,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:41:34,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745136771] [2019-10-14 21:41:34,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:41:34,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:41:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:41:34,099 INFO L87 Difference]: Start difference. First operand 183 states and 201 transitions. Second operand 17 states. [2019-10-14 21:41:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:34,643 INFO L93 Difference]: Finished difference Result 200 states and 218 transitions. [2019-10-14 21:41:34,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:41:34,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 102 [2019-10-14 21:41:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:34,646 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:41:34,646 INFO L226 Difference]: Without dead ends: 131 [2019-10-14 21:41:34,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-14 21:41:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2019-10-14 21:41:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:41:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2019-10-14 21:41:34,655 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2019-10-14 21:41:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:34,655 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2019-10-14 21:41:34,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:41:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2019-10-14 21:41:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:41:34,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:34,657 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:34,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:34,858 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash 930798029, now seen corresponding path program 8 times [2019-10-14 21:41:34,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:34,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405110965] [2019-10-14 21:41:34,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:34,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:34,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:36,313 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 12 [2019-10-14 21:41:36,516 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 16 [2019-10-14 21:41:36,752 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 12 [2019-10-14 21:41:37,016 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 14 [2019-10-14 21:41:37,369 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 23 [2019-10-14 21:41:37,703 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2019-10-14 21:41:37,988 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 31 [2019-10-14 21:41:38,390 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 39 [2019-10-14 21:41:38,713 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2019-10-14 21:41:39,041 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 38 [2019-10-14 21:41:39,342 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2019-10-14 21:41:39,657 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2019-10-14 21:41:39,934 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2019-10-14 21:41:40,234 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2019-10-14 21:41:40,524 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 36 [2019-10-14 21:41:40,867 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2019-10-14 21:41:41,232 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 34 [2019-10-14 21:41:41,536 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2019-10-14 21:41:41,839 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2019-10-14 21:41:42,089 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 25 [2019-10-14 21:41:42,337 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 19 [2019-10-14 21:41:42,572 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 19 [2019-10-14 21:41:44,737 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2019-10-14 21:41:44,887 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2019-10-14 21:41:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 1 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:46,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405110965] [2019-10-14 21:41:46,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073514663] [2019-10-14 21:41:46,350 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 21:41:46,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:46,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:46,443 WARN L254 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 179 conjunts are in the unsatisfiable core [2019-10-14 21:41:46,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:46,592 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:41:46,592 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:46,598 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:46,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:46,599 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7