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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:16,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:16,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:16,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:16,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:16,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:16,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:16,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:16,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:16,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:16,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:16,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:16,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:16,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:16,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:16,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:16,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:16,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:16,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:16,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:16,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:16,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:16,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:16,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:16,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 22:04:16,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 22:04:16,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 22:04:16,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 22:04:16,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 22:04:16,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 22:04:16,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:16,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:16,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:16,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:16,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:16,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:16,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:16,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:16,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:16,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:16,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:16,723 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 22:04:16,745 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:16,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:16,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:16,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:16,747 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:16,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:16,747 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:16,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:16,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:16,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:16,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:16,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:16,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:16,750 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:16,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:16,750 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:16,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:16,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:16,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:16,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:16,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:16,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:16,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:16,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:16,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:16,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:16,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:16,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:16,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:17,006 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:17,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:17,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:17,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:17,025 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:17,026 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-14 22:04:17,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000a08c80/4121f575998240e6afb3bfe88df0b477/FLAG95e05e9dc [2019-10-14 22:04:17,742 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:17,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-14 22:04:17,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000a08c80/4121f575998240e6afb3bfe88df0b477/FLAG95e05e9dc [2019-10-14 22:04:17,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000a08c80/4121f575998240e6afb3bfe88df0b477 [2019-10-14 22:04:17,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:17,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:17,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:17,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:17,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:17,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:17,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:17, skipping insertion in model container [2019-10-14 22:04:17,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:17" (1/1) ... [2019-10-14 22:04:18,000 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:18,065 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:18,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:18,807 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:19,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:19,194 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:19,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19 WrapperNode [2019-10-14 22:04:19,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:19,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:19,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:19,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:19,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (1/1) ... [2019-10-14 22:04:19,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:19,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:19,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:19,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:19,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (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 22:04:19,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:19,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:19,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:19,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:19,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:21,657 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:21,658 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:21,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21 BoogieIcfgContainer [2019-10-14 22:04:21,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:21,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:21,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:21,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:21,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:17" (1/3) ... [2019-10-14 22:04:21,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:19" (2/3) ... [2019-10-14 22:04:21,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:21, skipping insertion in model container [2019-10-14 22:04:21,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:21" (3/3) ... [2019-10-14 22:04:21,676 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2019-10-14 22:04:21,688 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:21,697 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:21,708 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:21,744 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:21,744 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:21,744 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:21,745 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:21,745 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:21,745 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:21,745 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:21,745 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 22:04:21,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:21,776 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] [2019-10-14 22:04:21,778 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1586905158, now seen corresponding path program 1 times [2019-10-14 22:04:21,792 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:21,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-14 22:04:21,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:21,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,129 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 22:04:22,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-14 22:04:22,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:22,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:22,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212898561] [2019-10-14 22:04:22,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:22,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:22,153 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:26,952 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-14 22:04:26,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:26,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-14 22:04:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:26,988 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:26,988 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:27,004 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 22:04:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1607 transitions. [2019-10-14 22:04:27,185 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1607 transitions. Word has length 41 [2019-10-14 22:04:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:27,187 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1607 transitions. [2019-10-14 22:04:27,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1607 transitions. [2019-10-14 22:04:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 22:04:27,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:27,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:27,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash 904307166, now seen corresponding path program 1 times [2019-10-14 22:04:27,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:27,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-14 22:04:27,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:27,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-14 22:04:27,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:27,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:27,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117883632] [2019-10-14 22:04:27,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:27,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:27,545 INFO L87 Difference]: Start difference. First operand 1031 states and 1607 transitions. Second operand 9 states. [2019-10-14 22:04:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:32,993 INFO L93 Difference]: Finished difference Result 4159 states and 6655 transitions. [2019-10-14 22:04:32,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:04:32,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2019-10-14 22:04:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:33,018 INFO L225 Difference]: With dead ends: 4159 [2019-10-14 22:04:33,018 INFO L226 Difference]: Without dead ends: 3134 [2019-10-14 22:04:33,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2019-10-14 22:04:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3113. [2019-10-14 22:04:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3113 states. [2019-10-14 22:04:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4592 transitions. [2019-10-14 22:04:33,145 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4592 transitions. Word has length 113 [2019-10-14 22:04:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:33,147 INFO L462 AbstractCegarLoop]: Abstraction has 3113 states and 4592 transitions. [2019-10-14 22:04:33,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4592 transitions. [2019-10-14 22:04:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-14 22:04:33,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:33,162 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:33,162 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash 953159946, now seen corresponding path program 1 times [2019-10-14 22:04:33,164 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:33,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736145996] [2019-10-14 22:04:33,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:33,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:33,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:04:33,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736145996] [2019-10-14 22:04:33,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203086959] [2019-10-14 22:04:33,813 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 22:04:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:33,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:34,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:34,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:34,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504398158] [2019-10-14 22:04:34,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:34,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:34,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:34,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:34,131 INFO L87 Difference]: Start difference. First operand 3113 states and 4592 transitions. Second operand 11 states. [2019-10-14 22:04:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:41,110 INFO L93 Difference]: Finished difference Result 8081 states and 12541 transitions. [2019-10-14 22:04:41,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 22:04:41,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 285 [2019-10-14 22:04:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:41,140 INFO L225 Difference]: With dead ends: 8081 [2019-10-14 22:04:41,140 INFO L226 Difference]: Without dead ends: 4974 [2019-10-14 22:04:41,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2019-10-14 22:04:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2019-10-14 22:04:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4604. [2019-10-14 22:04:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4604 states. [2019-10-14 22:04:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 6459 transitions. [2019-10-14 22:04:41,301 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 6459 transitions. Word has length 285 [2019-10-14 22:04:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:41,303 INFO L462 AbstractCegarLoop]: Abstraction has 4604 states and 6459 transitions. [2019-10-14 22:04:41,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 6459 transitions. [2019-10-14 22:04:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-14 22:04:41,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:41,312 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:41,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:41,516 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -932828961, now seen corresponding path program 1 times [2019-10-14 22:04:41,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:41,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455610080] [2019-10-14 22:04:41,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:41,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:41,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 68 proven. 130 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:42,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455610080] [2019-10-14 22:04:42,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855061547] [2019-10-14 22:04:42,187 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 22:04:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:42,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:42,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 22:04:42,455 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:42,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:42,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250680448] [2019-10-14 22:04:42,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:42,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:42,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:42,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:42,457 INFO L87 Difference]: Start difference. First operand 4604 states and 6459 transitions. Second operand 5 states. [2019-10-14 22:04:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:44,781 INFO L93 Difference]: Finished difference Result 10323 states and 14978 transitions. [2019-10-14 22:04:44,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:44,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2019-10-14 22:04:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:44,815 INFO L225 Difference]: With dead ends: 10323 [2019-10-14 22:04:44,815 INFO L226 Difference]: Without dead ends: 5725 [2019-10-14 22:04:44,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5725 states. [2019-10-14 22:04:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5725 to 5647. [2019-10-14 22:04:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5647 states. [2019-10-14 22:04:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7412 transitions. [2019-10-14 22:04:45,011 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7412 transitions. Word has length 320 [2019-10-14 22:04:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:45,012 INFO L462 AbstractCegarLoop]: Abstraction has 5647 states and 7412 transitions. [2019-10-14 22:04:45,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7412 transitions. [2019-10-14 22:04:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-10-14 22:04:45,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:45,021 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:45,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:45,234 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash 77897170, now seen corresponding path program 1 times [2019-10-14 22:04:45,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:45,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522865892] [2019-10-14 22:04:45,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:04:45,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522865892] [2019-10-14 22:04:45,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379009779] [2019-10-14 22:04:45,801 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 22:04:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:45,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:46,020 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:46,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:46,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816190440] [2019-10-14 22:04:46,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:46,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:46,022 INFO L87 Difference]: Start difference. First operand 5647 states and 7412 transitions. Second operand 11 states. [2019-10-14 22:04:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:51,444 INFO L93 Difference]: Finished difference Result 13826 states and 18765 transitions. [2019-10-14 22:04:51,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:04:51,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-10-14 22:04:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:51,483 INFO L225 Difference]: With dead ends: 13826 [2019-10-14 22:04:51,484 INFO L226 Difference]: Without dead ends: 7782 [2019-10-14 22:04:51,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:04:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2019-10-14 22:04:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 5981. [2019-10-14 22:04:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5981 states. [2019-10-14 22:04:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5981 states to 5981 states and 6791 transitions. [2019-10-14 22:04:51,680 INFO L78 Accepts]: Start accepts. Automaton has 5981 states and 6791 transitions. Word has length 347 [2019-10-14 22:04:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:51,681 INFO L462 AbstractCegarLoop]: Abstraction has 5981 states and 6791 transitions. [2019-10-14 22:04:51,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5981 states and 6791 transitions. [2019-10-14 22:04:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-10-14 22:04:51,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:51,694 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:51,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:51,907 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash 598801126, now seen corresponding path program 1 times [2019-10-14 22:04:51,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:51,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782245172] [2019-10-14 22:04:51,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:51,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:51,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 102 proven. 12 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-14 22:04:52,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782245172] [2019-10-14 22:04:52,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103746848] [2019-10-14 22:04:52,586 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 22:04:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:52,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 22:04:52,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 22:04:52,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:52,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 22:04:52,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903883715] [2019-10-14 22:04:52,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:04:52,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:52,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:04:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:52,896 INFO L87 Difference]: Start difference. First operand 5981 states and 6791 transitions. Second operand 3 states. [2019-10-14 22:04:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:54,214 INFO L93 Difference]: Finished difference Result 14023 states and 16105 transitions. [2019-10-14 22:04:54,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:04:54,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2019-10-14 22:04:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:54,266 INFO L225 Difference]: With dead ends: 14023 [2019-10-14 22:04:54,266 INFO L226 Difference]: Without dead ends: 8048 [2019-10-14 22:04:54,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8048 states. [2019-10-14 22:04:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8048 to 8048. [2019-10-14 22:04:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8048 states. [2019-10-14 22:04:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8048 states to 8048 states and 9128 transitions. [2019-10-14 22:04:54,513 INFO L78 Accepts]: Start accepts. Automaton has 8048 states and 9128 transitions. Word has length 503 [2019-10-14 22:04:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:54,515 INFO L462 AbstractCegarLoop]: Abstraction has 8048 states and 9128 transitions. [2019-10-14 22:04:54,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:04:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8048 states and 9128 transitions. [2019-10-14 22:04:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2019-10-14 22:04:54,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:54,548 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:54,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:54,753 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1409355214, now seen corresponding path program 1 times [2019-10-14 22:04:54,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:54,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205049863] [2019-10-14 22:04:54,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:54,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:54,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat