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/Problem11_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:45,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:45,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:45,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:45,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:45,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:45,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:45,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:45,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:45,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:45,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:45,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:45,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:45,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:45,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:45,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:45,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:45,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:45,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:45,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:45,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:45,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:45,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:45,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:45,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:45,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:45,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:45,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:45,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:45,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:45,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:45,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:45,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:45,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:45,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:45,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:45,541 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 18:00:45,567 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:45,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:45,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:45,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:45,570 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:45,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:45,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:45,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:45,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:45,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:45,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:45,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:45,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:45,574 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:45,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:45,574 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:45,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:45,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:45,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:45,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:45,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:45,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:45,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:45,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:45,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:45,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:45,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:45,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:45,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:45,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:45,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:45,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:45,866 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:45,867 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:45,867 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-13 18:00:45,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cc69144/aa8111e6df90436b808b7624566c2113/FLAG2417bd236 [2019-10-13 18:00:46,607 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:46,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-13 18:00:46,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cc69144/aa8111e6df90436b808b7624566c2113/FLAG2417bd236 [2019-10-13 18:00:46,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20cc69144/aa8111e6df90436b808b7624566c2113 [2019-10-13 18:00:46,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:46,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:46,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:46,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:46,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:46,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:46,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6ff8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46, skipping insertion in model container [2019-10-13 18:00:46,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:46,822 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:46,886 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:47,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:47,547 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:47,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:47,790 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:47,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47 WrapperNode [2019-10-13 18:00:47,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:47,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:47,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:47,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:47,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (1/1) ... [2019-10-13 18:00:47,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:47,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:47,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:47,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:47,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (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 18:00:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:48,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:48,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:48,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:48,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:50,124 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:50,124 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:50,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:50 BoogieIcfgContainer [2019-10-13 18:00:50,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:50,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:50,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:50,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:50,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:46" (1/3) ... [2019-10-13 18:00:50,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701ce2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:50, skipping insertion in model container [2019-10-13 18:00:50,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:47" (2/3) ... [2019-10-13 18:00:50,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701ce2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:50, skipping insertion in model container [2019-10-13 18:00:50,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:50" (3/3) ... [2019-10-13 18:00:50,156 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label51.c [2019-10-13 18:00:50,167 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:50,177 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:50,189 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:50,224 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:50,224 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:50,224 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:50,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:50,224 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:50,225 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:50,225 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:50,225 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 18:00:50,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:50,263 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:50,265 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 234227266, now seen corresponding path program 1 times [2019-10-13 18:00:50,286 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:50,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647368519] [2019-10-13 18:00:50,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:50,666 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 18:00:50,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647368519] [2019-10-13 18:00:50,668 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:50,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:50,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100041313] [2019-10-13 18:00:50,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:50,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:50,696 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:54,183 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-10-13 18:00:54,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:54,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-13 18:00:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:54,206 INFO L225 Difference]: With dead ends: 987 [2019-10-13 18:00:54,206 INFO L226 Difference]: Without dead ends: 626 [2019-10-13 18:00:54,218 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 18:00:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-13 18:00:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-10-13 18:00:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-13 18:00:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-10-13 18:00:54,309 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 17 [2019-10-13 18:00:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:54,310 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-10-13 18:00:54,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-10-13 18:00:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 18:00:54,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:54,319 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:00:54,320 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash -904309470, now seen corresponding path program 1 times [2019-10-13 18:00:54,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:54,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140747176] [2019-10-13 18:00:54,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:54,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:54,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:54,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140747176] [2019-10-13 18:00:54,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:54,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:54,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272958620] [2019-10-13 18:00:54,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:54,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:54,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:54,794 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-10-13 18:00:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:58,150 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-10-13 18:00:58,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:58,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2019-10-13 18:00:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:58,166 INFO L225 Difference]: With dead ends: 1652 [2019-10-13 18:00:58,167 INFO L226 Difference]: Without dead ends: 1232 [2019-10-13 18:00:58,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-13 18:00:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-10-13 18:00:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-10-13 18:00:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1683 transitions. [2019-10-13 18:00:58,286 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1683 transitions. Word has length 89 [2019-10-13 18:00:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:58,287 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1683 transitions. [2019-10-13 18:00:58,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1683 transitions. [2019-10-13 18:00:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 18:00:58,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:58,300 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:00:58,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:58,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1508869126, now seen corresponding path program 1 times [2019-10-13 18:00:58,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:58,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885054024] [2019-10-13 18:00:58,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:58,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:58,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885054024] [2019-10-13 18:00:58,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095287391] [2019-10-13 18:00:58,555 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 18:00:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:58,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:58,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:58,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:58,800 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:58,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 18:00:58,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865278891] [2019-10-13 18:00:58,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:58,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:58,802 INFO L87 Difference]: Start difference. First operand 1203 states and 1683 transitions. Second operand 5 states. [2019-10-13 18:01:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:00,548 INFO L93 Difference]: Finished difference Result 3024 states and 4220 transitions. [2019-10-13 18:01:00,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:01:00,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-10-13 18:01:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:00,561 INFO L225 Difference]: With dead ends: 3024 [2019-10-13 18:01:00,562 INFO L226 Difference]: Without dead ends: 1827 [2019-10-13 18:01:00,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:01:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2019-10-13 18:01:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1797. [2019-10-13 18:01:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2019-10-13 18:01:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2348 transitions. [2019-10-13 18:01:00,640 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2348 transitions. Word has length 91 [2019-10-13 18:01:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:00,642 INFO L462 AbstractCegarLoop]: Abstraction has 1797 states and 2348 transitions. [2019-10-13 18:01:00,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2348 transitions. [2019-10-13 18:01:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 18:01:00,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:00,651 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:01:00,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:00,857 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1685901178, now seen corresponding path program 1 times [2019-10-13 18:01:00,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:00,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335000652] [2019-10-13 18:01:00,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:00,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:00,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:01,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335000652] [2019-10-13 18:01:01,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371525664] [2019-10-13 18:01:01,119 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 18:01:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:01,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:01,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:01,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-13 18:01:01,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841102868] [2019-10-13 18:01:01,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:01,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:01,259 INFO L87 Difference]: Start difference. First operand 1797 states and 2348 transitions. Second operand 3 states. [2019-10-13 18:01:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:02,338 INFO L93 Difference]: Finished difference Result 3984 states and 5324 transitions. [2019-10-13 18:01:02,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:02,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-10-13 18:01:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:02,357 INFO L225 Difference]: With dead ends: 3984 [2019-10-13 18:01:02,357 INFO L226 Difference]: Without dead ends: 2381 [2019-10-13 18:01:02,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-10-13 18:01:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2180. [2019-10-13 18:01:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2180 states. [2019-10-13 18:01:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 2817 transitions. [2019-10-13 18:01:02,423 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 2817 transitions. Word has length 148 [2019-10-13 18:01:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:02,424 INFO L462 AbstractCegarLoop]: Abstraction has 2180 states and 2817 transitions. [2019-10-13 18:01:02,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 2817 transitions. [2019-10-13 18:01:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 18:01:02,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:02,429 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:02,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:02,632 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash 760632652, now seen corresponding path program 1 times [2019-10-13 18:01:02,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:02,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811410564] [2019-10-13 18:01:02,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:02,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:02,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:02,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811410564] [2019-10-13 18:01:02,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626430541] [2019-10-13 18:01:02,944 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 18:01:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:01:03,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:03,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:03,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:05,410 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 16 [2019-10-13 18:01:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:05,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:05,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2019-10-13 18:01:05,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495237894] [2019-10-13 18:01:05,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:05,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2019-10-13 18:01:05,498 INFO L87 Difference]: Start difference. First operand 2180 states and 2817 transitions. Second operand 8 states.