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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:44,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:44,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:44,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:44,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:44,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:44,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:44,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:44,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:44,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:44,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:44,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:44,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:44,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:44,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:44,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:44,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:44,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:44,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:44,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:44,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:44,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:44,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:44,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:44,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:44,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:44,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:44,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:44,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:44,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:44,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:44,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:44,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:44,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:44,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:44,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:44,560 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 18:00:44,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:44,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:44,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:44,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:44,589 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:44,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:44,590 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:44,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:44,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:44,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:44,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:44,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:44,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:44,592 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:44,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:44,592 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:44,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:44,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:44,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:44,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:44,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:44,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:44,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:44,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:44,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:44,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:44,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:44,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:44,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:44,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:44,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:44,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:44,931 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:44,931 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:44,932 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-13 18:00:45,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6adf82112/b941e41a620147b38debf819196b694d/FLAG16a3ed847 [2019-10-13 18:00:45,634 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:45,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-13 18:00:45,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6adf82112/b941e41a620147b38debf819196b694d/FLAG16a3ed847 [2019-10-13 18:00:45,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6adf82112/b941e41a620147b38debf819196b694d [2019-10-13 18:00:45,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:45,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:45,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:45,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:45,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:45,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:45" (1/1) ... [2019-10-13 18:00:45,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11574e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:45, skipping insertion in model container [2019-10-13 18:00:45,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:45" (1/1) ... [2019-10-13 18:00:45,956 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:46,013 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:46,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:46,627 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:46,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:46,951 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:46,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46 WrapperNode [2019-10-13 18:00:46,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:46,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:46,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:46,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:46,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:46,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (1/1) ... [2019-10-13 18:00:47,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:47,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:47,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:47,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:47,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (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 18:00:47,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:47,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:47,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:47,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:47,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:47,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:49,385 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:49,385 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:49,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:49 BoogieIcfgContainer [2019-10-13 18:00:49,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:49,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:49,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:49,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:49,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:45" (1/3) ... [2019-10-13 18:00:49,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:49, skipping insertion in model container [2019-10-13 18:00:49,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:46" (2/3) ... [2019-10-13 18:00:49,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2388e0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:49, skipping insertion in model container [2019-10-13 18:00:49,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:49" (3/3) ... [2019-10-13 18:00:49,412 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2019-10-13 18:00:49,423 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:49,433 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:49,445 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:49,490 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:49,490 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:49,490 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:49,490 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:49,490 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:49,491 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:49,491 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:49,491 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 18:00:49,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:49,536 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 18:00:49,539 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash -172206893, now seen corresponding path program 1 times [2019-10-13 18:00:49,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:49,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215030342] [2019-10-13 18:00:49,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:49,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:49,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:50,074 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 18:00:50,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215030342] [2019-10-13 18:00:50,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:50,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:50,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093437509] [2019-10-13 18:00:50,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:50,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:50,101 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:53,762 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-13 18:00:53,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:53,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-13 18:00:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:53,805 INFO L225 Difference]: With dead ends: 1009 [2019-10-13 18:00:53,805 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 18:00:53,820 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 18:00:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 18:00:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-13 18:00:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 18:00:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-13 18:00:53,953 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 42 [2019-10-13 18:00:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:53,954 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-13 18:00:53,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-13 18:00:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 18:00:53,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:53,969 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] [2019-10-13 18:00:53,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -258983758, now seen corresponding path program 1 times [2019-10-13 18:00:53,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:53,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588506733] [2019-10-13 18:00:53,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:53,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:53,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,300 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 18:00:54,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588506733] [2019-10-13 18:00:54,301 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:54,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:54,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713895957] [2019-10-13 18:00:54,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:54,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:54,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:54,309 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-13 18:00:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:57,346 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-13 18:00:57,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:57,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-13 18:00:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:57,364 INFO L225 Difference]: With dead ends: 2436 [2019-10-13 18:00:57,365 INFO L226 Difference]: Without dead ends: 1816 [2019-10-13 18:00:57,368 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 18:00:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-13 18:00:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-13 18:00:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-13 18:00:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-13 18:00:57,440 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 114 [2019-10-13 18:00:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:57,441 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-13 18:00:57,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-13 18:00:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 18:00:57,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:57,445 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] [2019-10-13 18:00:57,445 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -590798395, now seen corresponding path program 1 times [2019-10-13 18:00:57,446 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:57,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565283340] [2019-10-13 18:00:57,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:57,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:57,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,644 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 18:00:57,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565283340] [2019-10-13 18:00:57,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925653082] [2019-10-13 18:00:57,645 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 18:00:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:57,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:57,858 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 18:00:57,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:57,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:57,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949986260] [2019-10-13 18:00:57,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:57,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:57,870 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-13 18:00:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:58,911 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-13 18:00:58,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:58,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-13 18:00:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:58,932 INFO L225 Difference]: With dead ends: 4128 [2019-10-13 18:00:58,933 INFO L226 Difference]: Without dead ends: 2357 [2019-10-13 18:00:58,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-13 18:00:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-13 18:00:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 18:00:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-13 18:00:59,073 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 115 [2019-10-13 18:00:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:59,075 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-13 18:00:59,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-13 18:00:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 18:00:59,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:59,078 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] [2019-10-13 18:00:59,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:59,284 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -735764850, now seen corresponding path program 1 times [2019-10-13 18:00:59,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:59,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829899460] [2019-10-13 18:00:59,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:59,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:59,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,463 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 18:00:59,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829899460] [2019-10-13 18:00:59,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101563482] [2019-10-13 18:00:59,464 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 18:00:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:59,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:59,606 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 18:00:59,607 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:59,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:59,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743903089] [2019-10-13 18:00:59,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:59,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:59,610 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-13 18:01:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:00,611 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-13 18:01:00,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:00,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-13 18:01:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:00,624 INFO L225 Difference]: With dead ends: 4704 [2019-10-13 18:01:00,624 INFO L226 Difference]: Without dead ends: 2361 [2019-10-13 18:01:00,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-13 18:01:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-13 18:01:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 18:01:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-13 18:01:00,691 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 116 [2019-10-13 18:01:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:00,692 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-13 18:01:00,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-13 18:01:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 18:01:00,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:00,695 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] [2019-10-13 18:01:00,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:00,900 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 865187038, now seen corresponding path program 1 times [2019-10-13 18:01:00,900 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:00,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389373971] [2019-10-13 18:01:00,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:00,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:00,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,154 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 18:01:01,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389373971] [2019-10-13 18:01:01,154 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:01,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:01:01,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016845308] [2019-10-13 18:01:01,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:01:01,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:01:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:01,157 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-13 18:01:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:05,744 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-13 18:01:05,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:01:05,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2019-10-13 18:01:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:05,774 INFO L225 Difference]: With dead ends: 6927 [2019-10-13 18:01:05,775 INFO L226 Difference]: Without dead ends: 4584 [2019-10-13 18:01:05,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:01:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-13 18:01:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4527. [2019-10-13 18:01:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4527 states. [2019-10-13 18:01:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 5966 transitions. [2019-10-13 18:01:05,918 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 5966 transitions. Word has length 140 [2019-10-13 18:01:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:05,919 INFO L462 AbstractCegarLoop]: Abstraction has 4527 states and 5966 transitions. [2019-10-13 18:01:05,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:01:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 5966 transitions. [2019-10-13 18:01:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 18:01:05,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:05,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:05,925 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash 141894414, now seen corresponding path program 1 times [2019-10-13 18:01:05,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:05,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34255549] [2019-10-13 18:01:05,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:05,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:05,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:06,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34255549] [2019-10-13 18:01:06,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815676942] [2019-10-13 18:01:06,298 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 18:01:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:01:06,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:06,479 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:06,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-13 18:01:06,480 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951262002] [2019-10-13 18:01:06,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:06,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:06,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:06,482 INFO L87 Difference]: Start difference. First operand 4527 states and 5966 transitions. Second operand 8 states. [2019-10-13 18:01:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:08,860 INFO L93 Difference]: Finished difference Result 10872 states and 15386 transitions. [2019-10-13 18:01:08,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:01:08,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 187 [2019-10-13 18:01:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:08,894 INFO L225 Difference]: With dead ends: 10872 [2019-10-13 18:01:08,894 INFO L226 Difference]: Without dead ends: 6539 [2019-10-13 18:01:08,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:01:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-13 18:01:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6074. [2019-10-13 18:01:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6074 states. [2019-10-13 18:01:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6074 states to 6074 states and 7779 transitions. [2019-10-13 18:01:09,079 INFO L78 Accepts]: Start accepts. Automaton has 6074 states and 7779 transitions. Word has length 187 [2019-10-13 18:01:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:09,079 INFO L462 AbstractCegarLoop]: Abstraction has 6074 states and 7779 transitions. [2019-10-13 18:01:09,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:01:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6074 states and 7779 transitions. [2019-10-13 18:01:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-13 18:01:09,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:09,088 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, 1, 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 18:01:09,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:09,292 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash -12858038, now seen corresponding path program 1 times [2019-10-13 18:01:09,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:09,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756862465] [2019-10-13 18:01:09,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:09,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:09,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:09,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756862465] [2019-10-13 18:01:09,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278472447] [2019-10-13 18:01:09,582 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 18:01:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:09,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 18:01:09,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:09,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:09,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:01:09,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107450710] [2019-10-13 18:01:09,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:09,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:09,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:01:09,812 INFO L87 Difference]: Start difference. First operand 6074 states and 7779 transitions. Second operand 3 states. [2019-10-13 18:01:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:11,005 INFO L93 Difference]: Finished difference Result 13288 states and 17008 transitions. [2019-10-13 18:01:11,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:11,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-10-13 18:01:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:11,038 INFO L225 Difference]: With dead ends: 13288 [2019-10-13 18:01:11,038 INFO L226 Difference]: Without dead ends: 7220 [2019-10-13 18:01:11,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:01:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2019-10-13 18:01:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 6464. [2019-10-13 18:01:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6464 states. [2019-10-13 18:01:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 8226 transitions. [2019-10-13 18:01:11,198 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 8226 transitions. Word has length 205 [2019-10-13 18:01:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:11,199 INFO L462 AbstractCegarLoop]: Abstraction has 6464 states and 8226 transitions. [2019-10-13 18:01:11,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 8226 transitions. [2019-10-13 18:01:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-13 18:01:11,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:11,209 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, 1, 1, 1, 1, 1, 1, 1, 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 18:01:11,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:11,415 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 740362904, now seen corresponding path program 1 times [2019-10-13 18:01:11,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:11,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266887832] [2019-10-13 18:01:11,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:11,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:11,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:11,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266887832] [2019-10-13 18:01:11,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563967645] [2019-10-13 18:01:11,962 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 18:01:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:12,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:01:12,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:12,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 18:01:12,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:12,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-10-13 18:01:12,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974590478] [2019-10-13 18:01:12,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:12,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:01:12,172 INFO L87 Difference]: Start difference. First operand 6464 states and 8226 transitions. Second operand 5 states. [2019-10-13 18:01:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:13,675 INFO L93 Difference]: Finished difference Result 12993 states and 16652 transitions. [2019-10-13 18:01:13,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:01:13,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2019-10-13 18:01:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:13,708 INFO L225 Difference]: With dead ends: 12993 [2019-10-13 18:01:13,708 INFO L226 Difference]: Without dead ends: 6535 [2019-10-13 18:01:13,723 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:01:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2019-10-13 18:01:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6502. [2019-10-13 18:01:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-10-13 18:01:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 8317 transitions. [2019-10-13 18:01:13,861 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 8317 transitions. Word has length 209 [2019-10-13 18:01:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:13,861 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 8317 transitions. [2019-10-13 18:01:13,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 8317 transitions. [2019-10-13 18:01:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 18:01:13,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:13,867 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:14,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:14,079 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1863264608, now seen corresponding path program 1 times [2019-10-13 18:01:14,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:14,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437919181] [2019-10-13 18:01:14,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:14,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:14,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:14,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437919181] [2019-10-13 18:01:14,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467590352] [2019-10-13 18:01:14,372 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 18:01:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:14,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:14,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:14,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:01:14,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768977092] [2019-10-13 18:01:14,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:01:14,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:14,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:01:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:01:14,581 INFO L87 Difference]: Start difference. First operand 6502 states and 8317 transitions. Second operand 11 states. [2019-10-13 18:01:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:18,176 INFO L93 Difference]: Finished difference Result 14926 states and 20105 transitions. [2019-10-13 18:01:18,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 18:01:18,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2019-10-13 18:01:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:18,206 INFO L225 Difference]: With dead ends: 14926 [2019-10-13 18:01:18,207 INFO L226 Difference]: Without dead ends: 8430 [2019-10-13 18:01:18,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-13 18:01:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2019-10-13 18:01:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8270. [2019-10-13 18:01:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8270 states. [2019-10-13 18:01:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8270 states to 8270 states and 10481 transitions. [2019-10-13 18:01:18,403 INFO L78 Accepts]: Start accepts. Automaton has 8270 states and 10481 transitions. Word has length 244 [2019-10-13 18:01:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:18,403 INFO L462 AbstractCegarLoop]: Abstraction has 8270 states and 10481 transitions. [2019-10-13 18:01:18,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:01:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8270 states and 10481 transitions. [2019-10-13 18:01:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-13 18:01:18,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:18,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:18,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:18,624 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1936845333, now seen corresponding path program 1 times [2019-10-13 18:01:18,625 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:18,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235064772] [2019-10-13 18:01:18,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:18,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:18,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 87 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:19,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235064772] [2019-10-13 18:01:19,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476712855] [2019-10-13 18:01:19,224 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 18:01:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:19,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 18:01:19,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:19,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:19,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:19,581 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2019-10-13 18:01:19,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 71 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:19,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:19,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2019-10-13 18:01:19,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492147335] [2019-10-13 18:01:19,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 18:01:19,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 18:01:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:01:19,850 INFO L87 Difference]: Start difference. First operand 8270 states and 10481 transitions. Second operand 18 states.