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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:55,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:55,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:55,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:55,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:55,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:55,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:55,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:55,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:55,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:55,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:55,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:55,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:55,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:55,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:55,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:55,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:55,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:55,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:55,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:55,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:55,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:55,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:55,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:55,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:55,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:55,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:55,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:55,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:55,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:55,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:55,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:55,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:55,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:55,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:55,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:55,367 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 [2019-10-13 18:04:55,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:55,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:55,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:55,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:55,384 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:55,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:55,385 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:55,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:55,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:55,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:55,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:55,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:55,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:55,386 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:55,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:55,386 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:55,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:55,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:55,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:55,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:55,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:55,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:55,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:55,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:55,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:55,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:55,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:55,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:55,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:55,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:55,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:55,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:55,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:55,688 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:55,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-13 18:04:55,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccbc786b/c2848419e08c4d8bbfd6559e87313522/FLAG9fd6bb768 [2019-10-13 18:04:56,424 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:56,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-13 18:04:56,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccbc786b/c2848419e08c4d8bbfd6559e87313522/FLAG9fd6bb768 [2019-10-13 18:04:56,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ccbc786b/c2848419e08c4d8bbfd6559e87313522 [2019-10-13 18:04:56,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:56,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:56,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:56,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:56,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:56,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:56" (1/1) ... [2019-10-13 18:04:56,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d79651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:56, skipping insertion in model container [2019-10-13 18:04:56,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:56" (1/1) ... [2019-10-13 18:04:56,644 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:56,720 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:57,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:57,606 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:57,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:57,955 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:57,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57 WrapperNode [2019-10-13 18:04:57,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:57,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:57,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:57,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:57,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:57,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (1/1) ... [2019-10-13 18:04:58,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:58,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:58,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:58,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:58,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (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 [2019-10-13 18:04:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:58,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:58,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:58,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:58,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:58,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:00,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:00,714 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:00,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:00 BoogieIcfgContainer [2019-10-13 18:05:00,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:00,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:00,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:00,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:00,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:56" (1/3) ... [2019-10-13 18:05:00,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8886e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:00, skipping insertion in model container [2019-10-13 18:05:00,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:57" (2/3) ... [2019-10-13 18:05:00,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8886e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:00, skipping insertion in model container [2019-10-13 18:05:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:00" (3/3) ... [2019-10-13 18:05:00,732 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-10-13 18:05:00,745 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:00,766 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:00,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:00,828 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:00,828 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:00,828 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:00,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:00,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:00,829 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:00,829 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:00,829 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 18:05:00,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:00,880 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] [2019-10-13 18:05:00,882 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-10-13 18:05:00,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:00,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006784151] [2019-10-13 18:05:00,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:00,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:00,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:01,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006784151] [2019-10-13 18:05:01,312 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:01,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:01,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385528958] [2019-10-13 18:05:01,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:01,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:01,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:01,338 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:06,913 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-10-13 18:05:06,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:06,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-13 18:05:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:06,947 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:06,947 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:06,960 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 [2019-10-13 18:05:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-10-13 18:05:07,093 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 48 [2019-10-13 18:05:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:07,094 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-10-13 18:05:07,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-10-13 18:05:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 18:05:07,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:07,103 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, 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] [2019-10-13 18:05:07,104 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-10-13 18:05:07,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:07,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833572757] [2019-10-13 18:05:07,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:07,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:07,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:07,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833572757] [2019-10-13 18:05:07,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:07,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:05:07,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031933077] [2019-10-13 18:05:07,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:05:07,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:05:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:05:07,489 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-10-13 18:05:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:14,951 INFO L93 Difference]: Finished difference Result 3900 states and 6464 transitions. [2019-10-13 18:05:14,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:05:14,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-13 18:05:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:14,989 INFO L225 Difference]: With dead ends: 3900 [2019-10-13 18:05:14,990 INFO L226 Difference]: Without dead ends: 2875 [2019-10-13 18:05:14,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2019-10-13 18:05:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2811. [2019-10-13 18:05:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-10-13 18:05:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-10-13 18:05:15,142 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 123 [2019-10-13 18:05:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:15,145 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-10-13 18:05:15,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:05:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-10-13 18:05:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 18:05:15,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:15,156 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, 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] [2019-10-13 18:05:15,157 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-10-13 18:05:15,158 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:15,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324201517] [2019-10-13 18:05:15,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:15,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:15,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:15,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324201517] [2019-10-13 18:05:15,431 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:15,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:15,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485312545] [2019-10-13 18:05:15,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:15,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:15,441 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-10-13 18:05:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:21,236 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-10-13 18:05:21,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:05:21,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2019-10-13 18:05:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:21,280 INFO L225 Difference]: With dead ends: 9864 [2019-10-13 18:05:21,280 INFO L226 Difference]: Without dead ends: 7059 [2019-10-13 18:05:21,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:05:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-10-13 18:05:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-10-13 18:05:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-10-13 18:05:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10409 transitions. [2019-10-13 18:05:21,520 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10409 transitions. Word has length 127 [2019-10-13 18:05:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:21,523 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10409 transitions. [2019-10-13 18:05:21,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10409 transitions. [2019-10-13 18:05:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 18:05:21,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:21,531 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, 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, 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] [2019-10-13 18:05:21,531 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 462428277, now seen corresponding path program 1 times [2019-10-13 18:05:21,532 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:21,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573069765] [2019-10-13 18:05:21,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:21,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573069765] [2019-10-13 18:05:21,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78860783] [2019-10-13 18:05:21,837 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 [2019-10-13 18:05:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:22,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:22,295 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:22,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:22,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051178426] [2019-10-13 18:05:22,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:22,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:22,298 INFO L87 Difference]: Start difference. First operand 7025 states and 10409 transitions. Second operand 11 states. [2019-10-13 18:05:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:26,957 INFO L93 Difference]: Finished difference Result 17510 states and 26765 transitions. [2019-10-13 18:05:26,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:26,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-10-13 18:05:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:27,016 INFO L225 Difference]: With dead ends: 17510 [2019-10-13 18:05:27,017 INFO L226 Difference]: Without dead ends: 10491 [2019-10-13 18:05:27,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-10-13 18:05:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8749. [2019-10-13 18:05:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8749 states. [2019-10-13 18:05:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 12758 transitions. [2019-10-13 18:05:27,351 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 12758 transitions. Word has length 222 [2019-10-13 18:05:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:27,353 INFO L462 AbstractCegarLoop]: Abstraction has 8749 states and 12758 transitions. [2019-10-13 18:05:27,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 12758 transitions. [2019-10-13 18:05:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-10-13 18:05:27,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:27,361 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, 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, 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] [2019-10-13 18:05:27,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:27,568 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -986396595, now seen corresponding path program 1 times [2019-10-13 18:05:27,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:27,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782337846] [2019-10-13 18:05:27,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:27,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:27,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:27,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782337846] [2019-10-13 18:05:27,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158157252] [2019-10-13 18:05:27,975 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 [2019-10-13 18:05:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:28,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 18:05:28,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:28,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:28,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831445812] [2019-10-13 18:05:28,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:28,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:28,276 INFO L87 Difference]: Start difference. First operand 8749 states and 12758 transitions. Second operand 5 states. [2019-10-13 18:05:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:30,651 INFO L93 Difference]: Finished difference Result 19591 states and 28696 transitions. [2019-10-13 18:05:30,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:30,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-10-13 18:05:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:30,724 INFO L225 Difference]: With dead ends: 19591 [2019-10-13 18:05:30,725 INFO L226 Difference]: Without dead ends: 10848 [2019-10-13 18:05:30,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2019-10-13 18:05:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 9442. [2019-10-13 18:05:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9442 states. [2019-10-13 18:05:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 12597 transitions. [2019-10-13 18:05:31,228 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 12597 transitions. Word has length 298 [2019-10-13 18:05:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:31,229 INFO L462 AbstractCegarLoop]: Abstraction has 9442 states and 12597 transitions. [2019-10-13 18:05:31,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 12597 transitions. [2019-10-13 18:05:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2019-10-13 18:05:31,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:31,239 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:31,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:31,452 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1511616815, now seen corresponding path program 1 times [2019-10-13 18:05:31,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:31,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572373704] [2019-10-13 18:05:31,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:05:32,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572373704] [2019-10-13 18:05:32,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596088395] [2019-10-13 18:05:32,062 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 [2019-10-13 18:05:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:32,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:32,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:32,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:32,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463729295] [2019-10-13 18:05:32,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:32,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:32,441 INFO L87 Difference]: Start difference. First operand 9442 states and 12597 transitions. Second operand 11 states.