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/eca-rers2012/Problem10_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:57:52,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:57:52,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:57:52,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:57:52,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:57:52,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:57:52,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:57:52,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:57:52,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:57:52,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:57:52,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:57:52,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:57:52,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:57:52,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:57:52,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:57:52,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:57:52,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:57:52,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:57:52,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:57:52,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:57:52,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:57:52,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:57:52,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:57:52,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:57:52,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:57:52,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:57:52,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:57:52,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:57:52,972 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 21:57:52,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:57:52,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:57:52,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:57:52,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:57:52,991 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:57:52,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:57:52,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:57:52,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:57:52,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:57:52,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:57:52,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:57:52,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:57:52,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:57:52,994 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:57:52,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:57:52,994 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:57:52,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:57:52,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:57:52,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:57:52,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:57:52,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:57:52,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:57:52,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:57:52,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:57:52,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:57:52,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:57:52,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:57:52,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:57:52,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:57:53,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:57:53,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:57:53,263 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:57:53,265 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:57:53,265 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:57:53,266 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-14 21:57:53,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d692be27/524c1e9c40e3413897fb6a5a0d37809c/FLAGa2189dd7c [2019-10-14 21:57:53,907 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:57:53,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-14 21:57:53,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d692be27/524c1e9c40e3413897fb6a5a0d37809c/FLAGa2189dd7c [2019-10-14 21:57:54,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d692be27/524c1e9c40e3413897fb6a5a0d37809c [2019-10-14 21:57:54,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:57:54,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:57:54,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:54,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:57:54,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:57:54,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:54,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46dc529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54, skipping insertion in model container [2019-10-14 21:57:54,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:54,251 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:57:54,294 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:57:54,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:54,818 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:57:54,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:54,939 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:57:54,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54 WrapperNode [2019-10-14 21:57:54,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:54,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:57:54,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:57:54,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:57:54,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:54,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:54,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:54,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:55,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:55,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:55,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (1/1) ... [2019-10-14 21:57:55,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:57:55,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:57:55,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:57:55,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:57:55,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (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 21:57:55,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:57:55,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:57:55,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:57:55,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:57:55,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:57:55,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:57:55,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:57:55,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:57:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:57:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:57:55,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:57:56,353 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:57:56,356 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:57:56,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:56 BoogieIcfgContainer [2019-10-14 21:57:56,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:57:56,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:57:56,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:57:56,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:57:56,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:57:54" (1/3) ... [2019-10-14 21:57:56,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa434fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:56, skipping insertion in model container [2019-10-14 21:57:56,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:54" (2/3) ... [2019-10-14 21:57:56,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa434fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:56, skipping insertion in model container [2019-10-14 21:57:56,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:56" (3/3) ... [2019-10-14 21:57:56,374 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label48.c [2019-10-14 21:57:56,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:57:56,392 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:57:56,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:57:56,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:57:56,436 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:57:56,436 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:57:56,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:57:56,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:57:56,437 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:57:56,437 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:57:56,437 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:57:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:57:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:57:56,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:56,467 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:56,468 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times [2019-10-14 21:57:56,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:56,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475631114] [2019-10-14 21:57:56,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:56,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:56,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:56,726 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 21:57:56,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475631114] [2019-10-14 21:57:56,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:56,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:57:56,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560434573] [2019-10-14 21:57:56,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:56,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:57:56,755 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:58,706 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-14 21:57:58,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:58,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-14 21:57:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:58,725 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:58,725 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:58,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-14 21:57:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-14 21:57:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-14 21:57:58,820 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 13 [2019-10-14 21:57:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:58,820 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-14 21:57:58,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-14 21:57:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:57:58,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:58,825 INFO L380 BasicCegarLoop]: trace histogram [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, 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 21:57:58,825 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times [2019-10-14 21:57:58,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:58,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176041623] [2019-10-14 21:57:58,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:58,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:58,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:59,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176041623] [2019-10-14 21:57:59,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:59,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:59,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865628689] [2019-10-14 21:57:59,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:59,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:59,197 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 9 states. [2019-10-14 21:58:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:00,659 INFO L93 Difference]: Finished difference Result 1041 states and 1612 transitions. [2019-10-14 21:58:00,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:58:00,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-10-14 21:58:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:00,665 INFO L225 Difference]: With dead ends: 1041 [2019-10-14 21:58:00,665 INFO L226 Difference]: Without dead ends: 606 [2019-10-14 21:58:00,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:58:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-10-14 21:58:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 592. [2019-10-14 21:58:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-14 21:58:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 829 transitions. [2019-10-14 21:58:00,707 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 829 transitions. Word has length 86 [2019-10-14 21:58:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:00,707 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 829 transitions. [2019-10-14 21:58:00,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:58:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 829 transitions. [2019-10-14 21:58:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 21:58:00,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:00,712 INFO L380 BasicCegarLoop]: trace histogram [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, 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 21:58:00,712 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times [2019-10-14 21:58:00,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:00,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360835885] [2019-10-14 21:58:00,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:00,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:00,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:00,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360835885] [2019-10-14 21:58:00,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969341265] [2019-10-14 21:58:00,879 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 21:58:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:00,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:00,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:01,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:01,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:58:01,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143957394] [2019-10-14 21:58:01,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:01,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:01,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:01,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:01,039 INFO L87 Difference]: Start difference. First operand 592 states and 829 transitions. Second operand 3 states. [2019-10-14 21:58:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:01,629 INFO L93 Difference]: Finished difference Result 1615 states and 2274 transitions. [2019-10-14 21:58:01,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:01,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-14 21:58:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:01,637 INFO L225 Difference]: With dead ends: 1615 [2019-10-14 21:58:01,637 INFO L226 Difference]: Without dead ends: 1029 [2019-10-14 21:58:01,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-10-14 21:58:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 886. [2019-10-14 21:58:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-14 21:58:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1150 transitions. [2019-10-14 21:58:01,676 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1150 transitions. Word has length 92 [2019-10-14 21:58:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:01,676 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1150 transitions. [2019-10-14 21:58:01,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1150 transitions. [2019-10-14 21:58:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 21:58:01,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:01,684 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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 21:58:01,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:01,895 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times [2019-10-14 21:58:01,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:01,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082238254] [2019-10-14 21:58:01,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:01,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:01,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:02,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082238254] [2019-10-14 21:58:02,256 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:02,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:58:02,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519026075] [2019-10-14 21:58:02,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:58:02,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:02,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:58:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:58:02,258 INFO L87 Difference]: Start difference. First operand 886 states and 1150 transitions. Second operand 9 states. [2019-10-14 21:58:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:04,045 INFO L93 Difference]: Finished difference Result 2245 states and 2959 transitions. [2019-10-14 21:58:04,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:58:04,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2019-10-14 21:58:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:04,053 INFO L225 Difference]: With dead ends: 2245 [2019-10-14 21:58:04,053 INFO L226 Difference]: Without dead ends: 1365 [2019-10-14 21:58:04,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:58:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2019-10-14 21:58:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1057. [2019-10-14 21:58:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2019-10-14 21:58:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1317 transitions. [2019-10-14 21:58:04,094 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1317 transitions. Word has length 149 [2019-10-14 21:58:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:04,094 INFO L462 AbstractCegarLoop]: Abstraction has 1057 states and 1317 transitions. [2019-10-14 21:58:04,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:58:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1317 transitions. [2019-10-14 21:58:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:58:04,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:04,097 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:58:04,097 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1989322578, now seen corresponding path program 1 times [2019-10-14 21:58:04,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:04,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001187067] [2019-10-14 21:58:04,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:04,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:04,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:04,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001187067] [2019-10-14 21:58:04,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143802111] [2019-10-14 21:58:04,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:04,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:04,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:04,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:04,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:58:04,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048972762] [2019-10-14 21:58:04,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:58:04,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:58:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:58:04,633 INFO L87 Difference]: Start difference. First operand 1057 states and 1317 transitions. Second operand 11 states. [2019-10-14 21:58:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:07,811 INFO L93 Difference]: Finished difference Result 2933 states and 4043 transitions. [2019-10-14 21:58:07,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:58:07,811 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 173 [2019-10-14 21:58:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:07,824 INFO L225 Difference]: With dead ends: 2933 [2019-10-14 21:58:07,825 INFO L226 Difference]: Without dead ends: 1882 [2019-10-14 21:58:07,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:58:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2019-10-14 21:58:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1548. [2019-10-14 21:58:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2019-10-14 21:58:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1966 transitions. [2019-10-14 21:58:07,903 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 1966 transitions. Word has length 173 [2019-10-14 21:58:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:07,904 INFO L462 AbstractCegarLoop]: Abstraction has 1548 states and 1966 transitions. [2019-10-14 21:58:07,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:58:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 1966 transitions. [2019-10-14 21:58:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 21:58:07,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:07,911 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:58:08,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:08,116 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:08,116 INFO L82 PathProgramCache]: Analyzing trace with hash -885143483, now seen corresponding path program 1 times [2019-10-14 21:58:08,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:08,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093437145] [2019-10-14 21:58:08,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:08,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:08,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-14 21:58:08,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093437145] [2019-10-14 21:58:08,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227718169] [2019-10-14 21:58:08,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:08,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:08,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:58:08,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:08,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:58:08,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266284566] [2019-10-14 21:58:08,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:08,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:08,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:08,588 INFO L87 Difference]: Start difference. First operand 1548 states and 1966 transitions. Second operand 3 states. [2019-10-14 21:58:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:09,182 INFO L93 Difference]: Finished difference Result 4274 states and 5547 transitions. [2019-10-14 21:58:09,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:09,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2019-10-14 21:58:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:09,197 INFO L225 Difference]: With dead ends: 4274 [2019-10-14 21:58:09,198 INFO L226 Difference]: Without dead ends: 2732 [2019-10-14 21:58:09,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2019-10-14 21:58:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2585. [2019-10-14 21:58:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2585 states. [2019-10-14 21:58:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3228 transitions. [2019-10-14 21:58:09,284 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3228 transitions. Word has length 190 [2019-10-14 21:58:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:09,285 INFO L462 AbstractCegarLoop]: Abstraction has 2585 states and 3228 transitions. [2019-10-14 21:58:09,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3228 transitions. [2019-10-14 21:58:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-14 21:58:09,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:09,291 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 21:58:09,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:09,496 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1354539530, now seen corresponding path program 1 times [2019-10-14 21:58:09,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:09,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540926223] [2019-10-14 21:58:09,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:09,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:09,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:58:09,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540926223] [2019-10-14 21:58:09,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302065382] [2019-10-14 21:58:09,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:10,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:10,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:10,200 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:10,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-14 21:58:10,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779741139] [2019-10-14 21:58:10,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:58:10,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:58:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:58:10,203 INFO L87 Difference]: Start difference. First operand 2585 states and 3228 transitions. Second operand 13 states. [2019-10-14 21:58:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:13,672 INFO L93 Difference]: Finished difference Result 7087 states and 8798 transitions. [2019-10-14 21:58:13,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:58:13,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 233 [2019-10-14 21:58:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:13,687 INFO L225 Difference]: With dead ends: 7087 [2019-10-14 21:58:13,687 INFO L226 Difference]: Without dead ends: 2867 [2019-10-14 21:58:13,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:58:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2019-10-14 21:58:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2275. [2019-10-14 21:58:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2019-10-14 21:58:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2611 transitions. [2019-10-14 21:58:13,767 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2611 transitions. Word has length 233 [2019-10-14 21:58:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:13,767 INFO L462 AbstractCegarLoop]: Abstraction has 2275 states and 2611 transitions. [2019-10-14 21:58:13,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:58:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2611 transitions. [2019-10-14 21:58:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-14 21:58:13,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:13,774 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2019-10-14 21:58:13,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:13,979 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash 997665666, now seen corresponding path program 1 times [2019-10-14 21:58:13,980 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:13,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697116115] [2019-10-14 21:58:13,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:13,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:13,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:58:14,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697116115] [2019-10-14 21:58:14,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319054394] [2019-10-14 21:58:14,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:14,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:14,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:58:14,409 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:14,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:58:14,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870954716] [2019-10-14 21:58:14,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:14,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:14,411 INFO L87 Difference]: Start difference. First operand 2275 states and 2611 transitions. Second operand 3 states. [2019-10-14 21:58:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:14,915 INFO L93 Difference]: Finished difference Result 4838 states and 5609 transitions. [2019-10-14 21:58:14,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:14,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 269 [2019-10-14 21:58:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:14,931 INFO L225 Difference]: With dead ends: 4838 [2019-10-14 21:58:14,931 INFO L226 Difference]: Without dead ends: 2565 [2019-10-14 21:58:14,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:58:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2019-10-14 21:58:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2565. [2019-10-14 21:58:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2565 states. [2019-10-14 21:58:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 2941 transitions. [2019-10-14 21:58:15,003 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 2941 transitions. Word has length 269 [2019-10-14 21:58:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:15,003 INFO L462 AbstractCegarLoop]: Abstraction has 2565 states and 2941 transitions. [2019-10-14 21:58:15,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 2941 transitions. [2019-10-14 21:58:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-14 21:58:15,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:15,011 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:15,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:15,219 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -126778982, now seen corresponding path program 1 times [2019-10-14 21:58:15,220 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:15,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235214683] [2019-10-14 21:58:15,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:15,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:15,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 87 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:58:15,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235214683] [2019-10-14 21:58:15,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365142672] [2019-10-14 21:58:15,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:58:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:15,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:58:15,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:16,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:58:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 21:58:16,107 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:16,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 17 [2019-10-14 21:58:16,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235397977] [2019-10-14 21:58:16,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:58:16,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:58:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:58:16,109 INFO L87 Difference]: Start difference. First operand 2565 states and 2941 transitions. Second operand 17 states. [2019-10-14 21:58:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:22,937 INFO L93 Difference]: Finished difference Result 6285 states and 7591 transitions. [2019-10-14 21:58:22,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:58:22,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 273 [2019-10-14 21:58:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:22,955 INFO L225 Difference]: With dead ends: 6285 [2019-10-14 21:58:22,956 INFO L226 Difference]: Without dead ends: 3869 [2019-10-14 21:58:22,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:58:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2019-10-14 21:58:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 3755. [2019-10-14 21:58:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3755 states. [2019-10-14 21:58:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 4309 transitions. [2019-10-14 21:58:23,090 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 4309 transitions. Word has length 273 [2019-10-14 21:58:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:23,091 INFO L462 AbstractCegarLoop]: Abstraction has 3755 states and 4309 transitions. [2019-10-14 21:58:23,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:58:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 4309 transitions. [2019-10-14 21:58:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-10-14 21:58:23,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:23,105 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:23,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:23,309 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1681862689, now seen corresponding path program 1 times [2019-10-14 21:58:23,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:23,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243946947] [2019-10-14 21:58:23,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:23,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:23,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 234 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:58:23,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243946947] [2019-10-14 21:58:23,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243963764] [2019-10-14 21:58:23,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:23,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:58:23,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:23,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:23,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:58:24,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:58:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:58:24,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:58:24,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-10-14 21:58:24,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700838919] [2019-10-14 21:58:24,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:58:24,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:24,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:58:24,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:58:24,285 INFO L87 Difference]: Start difference. First operand 3755 states and 4309 transitions. Second operand 19 states.