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/Problem14_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:17,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:17,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:17,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:17,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:17,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:17,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:17,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:17,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:17,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:17,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:17,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:17,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:17,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:17,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:17,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:17,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:17,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:17,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:17,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:17,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:17,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:17,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:17,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:17,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:17,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:17,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:17,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:17,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:17,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:17,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:17,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:17,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:17,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:17,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:17,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:17,726 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 18:03:17,740 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:17,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:17,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:17,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:17,742 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:17,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:17,742 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:17,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:17,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:17,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:17,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:17,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:17,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:17,744 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:17,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:17,744 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:17,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:17,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:17,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:17,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:17,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:17,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:17,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:17,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:17,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:17,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:17,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:17,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:17,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:18,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:18,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:18,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:18,087 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:18,087 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:18,088 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-13 18:03:18,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d40874c2/47b66a81fb4e46bf84f8747d8fae84b8/FLAGeb5b80885 [2019-10-13 18:03:18,783 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:18,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-13 18:03:18,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d40874c2/47b66a81fb4e46bf84f8747d8fae84b8/FLAGeb5b80885 [2019-10-13 18:03:19,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d40874c2/47b66a81fb4e46bf84f8747d8fae84b8 [2019-10-13 18:03:19,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:19,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:19,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:19,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:19,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:19,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19, skipping insertion in model container [2019-10-13 18:03:19,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,061 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:19,124 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:19,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:19,696 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:19,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:20,005 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:20,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20 WrapperNode [2019-10-13 18:03:20,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:20,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:20,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:20,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:20,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (1/1) ... [2019-10-13 18:03:20,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:20,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:20,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:20,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:20,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (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 18:03:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:21,849 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:21,849 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:21,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:21 BoogieIcfgContainer [2019-10-13 18:03:21,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:21,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:21,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:21,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:21,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:19" (1/3) ... [2019-10-13 18:03:21,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f0053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:21, skipping insertion in model container [2019-10-13 18:03:21,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:20" (2/3) ... [2019-10-13 18:03:21,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f0053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:21, skipping insertion in model container [2019-10-13 18:03:21,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:21" (3/3) ... [2019-10-13 18:03:21,868 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-10-13 18:03:21,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:21,892 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:21,903 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:21,946 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:21,946 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:21,946 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:21,946 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:21,946 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:21,947 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:21,947 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:21,947 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 18:03:21,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:21,981 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] [2019-10-13 18:03:21,983 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-10-13 18:03:21,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:21,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695643572] [2019-10-13 18:03:21,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,363 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 18:03:22,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695643572] [2019-10-13 18:03:22,365 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:22,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:22,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196012756] [2019-10-13 18:03:22,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:22,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:22,394 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:25,260 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-13 18:03:25,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:25,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-13 18:03:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:25,280 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:03:25,281 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:25,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-13 18:03:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-13 18:03:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-13 18:03:25,383 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 42 [2019-10-13 18:03:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:25,383 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-13 18:03:25,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-13 18:03:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:03:25,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:25,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:25,393 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-10-13 18:03:25,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:25,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827669990] [2019-10-13 18:03:25,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:25,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827669990] [2019-10-13 18:03:25,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503101696] [2019-10-13 18:03:25,795 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 18:03:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:25,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:25,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:25,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:25,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564021117] [2019-10-13 18:03:25,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:25,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:25,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:25,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:25,952 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-13 18:03:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:26,845 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-10-13 18:03:26,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:26,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-13 18:03:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:26,855 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 18:03:26,856 INFO L226 Difference]: Without dead ends: 744 [2019-10-13 18:03:26,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-13 18:03:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-13 18:03:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 18:03:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-10-13 18:03:26,917 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 125 [2019-10-13 18:03:26,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:26,918 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-10-13 18:03:26,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-10-13 18:03:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 18:03:26,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:26,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:27,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:27,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-10-13 18:03:27,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:27,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409606607] [2019-10-13 18:03:27,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:27,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409606607] [2019-10-13 18:03:27,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359489094] [2019-10-13 18:03:27,414 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 18:03:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:27,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:27,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:27,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:27,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234258280] [2019-10-13 18:03:27,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:27,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:27,539 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 3 states. [2019-10-13 18:03:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:28,404 INFO L93 Difference]: Finished difference Result 1850 states and 2489 transitions. [2019-10-13 18:03:28,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:28,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-10-13 18:03:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:28,412 INFO L225 Difference]: With dead ends: 1850 [2019-10-13 18:03:28,412 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:03:28,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:03:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:03:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:03:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1426 transitions. [2019-10-13 18:03:28,480 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1426 transitions. Word has length 137 [2019-10-13 18:03:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:28,481 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1426 transitions. [2019-10-13 18:03:28,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1426 transitions. [2019-10-13 18:03:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 18:03:28,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:28,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:28,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:28,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 514032181, now seen corresponding path program 1 times [2019-10-13 18:03:28,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:28,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993609339] [2019-10-13 18:03:28,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:03:28,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993609339] [2019-10-13 18:03:28,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384139499] [2019-10-13 18:03:28,878 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 18:03:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:28,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:28,965 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:28,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:03:28,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411303746] [2019-10-13 18:03:28,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:28,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:28,967 INFO L87 Difference]: Start difference. First operand 1112 states and 1426 transitions. Second operand 3 states. [2019-10-13 18:03:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:29,846 INFO L93 Difference]: Finished difference Result 1848 states and 2448 transitions. [2019-10-13 18:03:29,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:29,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-10-13 18:03:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:29,862 INFO L225 Difference]: With dead ends: 1848 [2019-10-13 18:03:29,865 INFO L226 Difference]: Without dead ends: 1846 [2019-10-13 18:03:29,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2019-10-13 18:03:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1298. [2019-10-13 18:03:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-10-13 18:03:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1738 transitions. [2019-10-13 18:03:29,929 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1738 transitions. Word has length 151 [2019-10-13 18:03:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:29,930 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1738 transitions. [2019-10-13 18:03:29,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1738 transitions. [2019-10-13 18:03:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-13 18:03:29,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:29,936 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:30,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:30,142 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash -16458088, now seen corresponding path program 1 times [2019-10-13 18:03:30,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:30,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867321242] [2019-10-13 18:03:30,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:30,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:30,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:30,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867321242] [2019-10-13 18:03:30,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550112458] [2019-10-13 18:03:30,378 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 [2019-10-13 18:03:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:30,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:30,684 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:30,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:03:30,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926827242] [2019-10-13 18:03:30,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:03:30,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:03:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:30,689 INFO L87 Difference]: Start difference. First operand 1298 states and 1738 transitions. Second operand 11 states. [2019-10-13 18:03:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:36,212 INFO L93 Difference]: Finished difference Result 5136 states and 7486 transitions. [2019-10-13 18:03:36,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:03:36,213 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 205 [2019-10-13 18:03:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:36,236 INFO L225 Difference]: With dead ends: 5136 [2019-10-13 18:03:36,236 INFO L226 Difference]: Without dead ends: 3090 [2019-10-13 18:03:36,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2019-10-13 18:03:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2278. [2019-10-13 18:03:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-13 18:03:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3031 transitions. [2019-10-13 18:03:36,340 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3031 transitions. Word has length 205 [2019-10-13 18:03:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:36,341 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3031 transitions. [2019-10-13 18:03:36,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:03:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3031 transitions. [2019-10-13 18:03:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-13 18:03:36,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:36,349 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:36,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:36,553 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-10-13 18:03:36,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:36,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58454193] [2019-10-13 18:03:36,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:36,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:36,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:37,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58454193] [2019-10-13 18:03:37,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518949486] [2019-10-13 18:03:37,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:37,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:37,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:37,253 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 18:03:37,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:37,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:03:37,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326862114] [2019-10-13 18:03:37,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:03:37,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:03:37,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:37,256 INFO L87 Difference]: Start difference. First operand 2278 states and 3031 transitions. Second operand 11 states. [2019-10-13 18:03:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:40,902 INFO L93 Difference]: Finished difference Result 4784 states and 6518 transitions. [2019-10-13 18:03:40,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:03:40,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-10-13 18:03:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:40,913 INFO L225 Difference]: With dead ends: 4784 [2019-10-13 18:03:40,914 INFO L226 Difference]: Without dead ends: 2124 [2019-10-13 18:03:40,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:40,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2019-10-13 18:03:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2082. [2019-10-13 18:03:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2082 states. [2019-10-13 18:03:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2605 transitions. [2019-10-13 18:03:40,987 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2605 transitions. Word has length 256 [2019-10-13 18:03:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:40,987 INFO L462 AbstractCegarLoop]: Abstraction has 2082 states and 2605 transitions. [2019-10-13 18:03:40,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:03:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2605 transitions. [2019-10-13 18:03:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-13 18:03:40,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:40,994 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:41,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,198 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1463904413, now seen corresponding path program 1 times [2019-10-13 18:03:41,199 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:41,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016316779] [2019-10-13 18:03:41,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:41,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016316779] [2019-10-13 18:03:41,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277764097] [2019-10-13 18:03:41,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:41,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:41,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:41,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:03:41,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548937043] [2019-10-13 18:03:41,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:03:41,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:03:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:41,741 INFO L87 Difference]: Start difference. First operand 2082 states and 2605 transitions. Second operand 11 states. [2019-10-13 18:03:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:45,394 INFO L93 Difference]: Finished difference Result 5874 states and 8061 transitions. [2019-10-13 18:03:45,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 18:03:45,397 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-10-13 18:03:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:45,419 INFO L225 Difference]: With dead ends: 5874 [2019-10-13 18:03:45,419 INFO L226 Difference]: Without dead ends: 3412 [2019-10-13 18:03:45,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-13 18:03:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2019-10-13 18:03:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2976. [2019-10-13 18:03:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2019-10-13 18:03:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4140 transitions. [2019-10-13 18:03:45,542 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4140 transitions. Word has length 256 [2019-10-13 18:03:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:45,543 INFO L462 AbstractCegarLoop]: Abstraction has 2976 states and 4140 transitions. [2019-10-13 18:03:45,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:03:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4140 transitions. [2019-10-13 18:03:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-13 18:03:45,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:45,550 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:45,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:45,755 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:45,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:45,755 INFO L82 PathProgramCache]: Analyzing trace with hash 943526086, now seen corresponding path program 1 times [2019-10-13 18:03:45,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:45,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441569814] [2019-10-13 18:03:45,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:45,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:45,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:03:46,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441569814] [2019-10-13 18:03:46,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411235334] [2019-10-13 18:03:46,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:46,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:46,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 18:03:46,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:46,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:03:46,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302236657] [2019-10-13 18:03:46,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:46,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:46,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:46,502 INFO L87 Difference]: Start difference. First operand 2976 states and 4140 transitions. Second operand 5 states. [2019-10-13 18:03:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:47,845 INFO L93 Difference]: Finished difference Result 5492 states and 7614 transitions. [2019-10-13 18:03:47,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:03:47,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-10-13 18:03:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:47,875 INFO L225 Difference]: With dead ends: 5492 [2019-10-13 18:03:47,876 INFO L226 Difference]: Without dead ends: 2732 [2019-10-13 18:03:47,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2019-10-13 18:03:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2690. [2019-10-13 18:03:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-10-13 18:03:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3454 transitions. [2019-10-13 18:03:48,007 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3454 transitions. Word has length 287 [2019-10-13 18:03:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:48,008 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 3454 transitions. [2019-10-13 18:03:48,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3454 transitions. [2019-10-13 18:03:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-13 18:03:48,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:48,027 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 18:03:48,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:48,231 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2088265127, now seen corresponding path program 1 times [2019-10-13 18:03:48,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:48,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263224789] [2019-10-13 18:03:48,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 115 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:49,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263224789] [2019-10-13 18:03:49,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766658677] [2019-10-13 18:03:49,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:49,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-10-13 18:03:49,830 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:49,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-10-13 18:03:49,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914146928] [2019-10-13 18:03:49,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:49,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:49,831 INFO L87 Difference]: Start difference. First operand 2690 states and 3454 transitions. Second operand 3 states. [2019-10-13 18:03:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:50,621 INFO L93 Difference]: Finished difference Result 5564 states and 7110 transitions. [2019-10-13 18:03:50,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:50,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2019-10-13 18:03:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:50,637 INFO L225 Difference]: With dead ends: 5564 [2019-10-13 18:03:50,638 INFO L226 Difference]: Without dead ends: 2872 [2019-10-13 18:03:50,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2019-10-13 18:03:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2684. [2019-10-13 18:03:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2019-10-13 18:03:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3406 transitions. [2019-10-13 18:03:50,712 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3406 transitions. Word has length 343 [2019-10-13 18:03:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:50,713 INFO L462 AbstractCegarLoop]: Abstraction has 2684 states and 3406 transitions. [2019-10-13 18:03:50,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3406 transitions. [2019-10-13 18:03:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-10-13 18:03:50,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:50,721 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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 18:03:50,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:50,926 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 366121579, now seen corresponding path program 1 times [2019-10-13 18:03:50,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:50,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376368550] [2019-10-13 18:03:50,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:50,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 115 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:52,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376368550] [2019-10-13 18:03:52,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743655816] [2019-10-13 18:03:52,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:52,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:52,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 296 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 18:03:52,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:52,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:52,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046902097] [2019-10-13 18:03:52,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:52,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:52,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:52,592 INFO L87 Difference]: Start difference. First operand 2684 states and 3406 transitions. Second operand 16 states.