/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:31,498 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:41:31,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:31,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:31,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:31,557 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 [2019-11-07 01:41:31,579 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:31,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:31,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:31,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:31,581 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:31,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:31,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:31,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:31,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:31,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:31,586 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:31,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:31,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:31,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:31,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:31,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:31,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:31,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:31,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:31,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:31,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:31,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:31,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:31,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:41:31,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:31,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:31,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:31,901 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:31,901 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:31,902 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-07 01:41:31,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45eea1a50/b56b39e7d3ce4858ae2a284e90ffd427/FLAG5b8ac7b1b [2019-11-07 01:41:32,654 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:32,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-07 01:41:32,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45eea1a50/b56b39e7d3ce4858ae2a284e90ffd427/FLAG5b8ac7b1b [2019-11-07 01:41:32,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45eea1a50/b56b39e7d3ce4858ae2a284e90ffd427 [2019-11-07 01:41:32,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:32,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:32,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:32,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:32,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:32,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:32" (1/1) ... [2019-11-07 01:41:32,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:32, skipping insertion in model container [2019-11-07 01:41:32,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:32" (1/1) ... [2019-11-07 01:41:32,879 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:32,953 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:33,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:33,884 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:34,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:34,201 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:34,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34 WrapperNode [2019-11-07 01:41:34,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:34,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:34,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:34,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:34,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (1/1) ... [2019-11-07 01:41:34,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:34,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:34,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:34,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:34,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (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 [2019-11-07 01:41:34,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:34,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:34,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:34,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:34,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:34,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:34,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:37,601 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:37,601 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:37,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:37 BoogieIcfgContainer [2019-11-07 01:41:37,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:37,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:37,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:37,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:37,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:32" (1/3) ... [2019-11-07 01:41:37,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184dea5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:37, skipping insertion in model container [2019-11-07 01:41:37,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:34" (2/3) ... [2019-11-07 01:41:37,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184dea5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:37, skipping insertion in model container [2019-11-07 01:41:37,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:37" (3/3) ... [2019-11-07 01:41:37,612 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-11-07 01:41:37,622 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:37,631 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:37,643 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:37,671 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:37,671 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:37,671 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:37,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:37,671 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:37,671 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:37,672 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:37,672 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:41:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:41:37,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:37,710 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:37,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:37,718 INFO L82 PathProgramCache]: Analyzing trace with hash 136466726, now seen corresponding path program 1 times [2019-11-07 01:41:37,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:37,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919954972] [2019-11-07 01:41:37,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:38,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919954972] [2019-11-07 01:41:38,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:38,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:38,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6850014] [2019-11-07 01:41:38,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:38,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:38,459 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-11-07 01:41:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:39,573 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-11-07 01:41:39,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:39,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 01:41:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:39,595 INFO L225 Difference]: With dead ends: 462 [2019-11-07 01:41:39,596 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:41:39,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:41:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-11-07 01:41:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:41:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-11-07 01:41:39,711 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-11-07 01:41:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:39,712 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-11-07 01:41:39,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-11-07 01:41:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:41:39,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:39,718 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:39,718 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash 558836669, now seen corresponding path program 1 times [2019-11-07 01:41:39,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:39,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226657528] [2019-11-07 01:41:39,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:39,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226657528] [2019-11-07 01:41:39,872 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:39,872 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:39,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930799657] [2019-11-07 01:41:39,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:39,875 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:39,875 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-11-07 01:41:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:41,393 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-11-07 01:41:41,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:41,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-07 01:41:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:41,402 INFO L225 Difference]: With dead ends: 929 [2019-11-07 01:41:41,402 INFO L226 Difference]: Without dead ends: 633 [2019-11-07 01:41:41,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-07 01:41:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-11-07 01:41:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-07 01:41:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-11-07 01:41:41,468 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-11-07 01:41:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:41,468 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-11-07 01:41:41,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-11-07 01:41:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:41:41,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:41,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:41,475 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1532435182, now seen corresponding path program 1 times [2019-11-07 01:41:41,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:41,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493997052] [2019-11-07 01:41:41,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:41,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493997052] [2019-11-07 01:41:41,683 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:41,683 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:41,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432333737] [2019-11-07 01:41:41,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:41,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:41,687 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-11-07 01:41:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:42,780 INFO L93 Difference]: Finished difference Result 1793 states and 3375 transitions. [2019-11-07 01:41:42,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:42,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:41:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:42,795 INFO L225 Difference]: With dead ends: 1793 [2019-11-07 01:41:42,796 INFO L226 Difference]: Without dead ends: 1195 [2019-11-07 01:41:42,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-11-07 01:41:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-11-07 01:41:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-11-07 01:41:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2084 transitions. [2019-11-07 01:41:42,861 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2084 transitions. Word has length 161 [2019-11-07 01:41:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:42,862 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2084 transitions. [2019-11-07 01:41:42,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2084 transitions. [2019-11-07 01:41:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 01:41:42,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:42,873 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:42,873 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash -627087197, now seen corresponding path program 1 times [2019-11-07 01:41:42,874 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:42,875 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991980978] [2019-11-07 01:41:42,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:43,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991980978] [2019-11-07 01:41:43,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:43,129 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:43,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508509407] [2019-11-07 01:41:43,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:43,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:43,132 INFO L87 Difference]: Start difference. First operand 1195 states and 2084 transitions. Second operand 3 states. [2019-11-07 01:41:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:44,157 INFO L93 Difference]: Finished difference Result 3569 states and 6418 transitions. [2019-11-07 01:41:44,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:44,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-11-07 01:41:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:44,175 INFO L225 Difference]: With dead ends: 3569 [2019-11-07 01:41:44,176 INFO L226 Difference]: Without dead ends: 2379 [2019-11-07 01:41:44,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2019-11-07 01:41:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2019-11-07 01:41:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2019-11-07 01:41:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 4004 transitions. [2019-11-07 01:41:44,260 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 4004 transitions. Word has length 181 [2019-11-07 01:41:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:44,261 INFO L462 AbstractCegarLoop]: Abstraction has 2379 states and 4004 transitions. [2019-11-07 01:41:44,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 4004 transitions. [2019-11-07 01:41:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 01:41:44,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:44,270 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:44,270 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash 712250693, now seen corresponding path program 1 times [2019-11-07 01:41:44,271 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:44,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065766076] [2019-11-07 01:41:44,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:44,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065766076] [2019-11-07 01:41:44,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:44,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:44,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80426131] [2019-11-07 01:41:44,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:44,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:44,409 INFO L87 Difference]: Start difference. First operand 2379 states and 4004 transitions. Second operand 6 states. [2019-11-07 01:41:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:45,856 INFO L93 Difference]: Finished difference Result 6993 states and 12761 transitions. [2019-11-07 01:41:45,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:41:45,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2019-11-07 01:41:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:45,890 INFO L225 Difference]: With dead ends: 6993 [2019-11-07 01:41:45,890 INFO L226 Difference]: Without dead ends: 4619 [2019-11-07 01:41:45,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2019-11-07 01:41:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 4555. [2019-11-07 01:41:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4555 states. [2019-11-07 01:41:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 7055 transitions. [2019-11-07 01:41:46,080 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 7055 transitions. Word has length 186 [2019-11-07 01:41:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:46,080 INFO L462 AbstractCegarLoop]: Abstraction has 4555 states and 7055 transitions. [2019-11-07 01:41:46,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 7055 transitions. [2019-11-07 01:41:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-07 01:41:46,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:46,100 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:46,100 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:46,100 INFO L82 PathProgramCache]: Analyzing trace with hash 938378696, now seen corresponding path program 1 times [2019-11-07 01:41:46,101 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:46,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623765853] [2019-11-07 01:41:46,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:46,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623765853] [2019-11-07 01:41:46,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:46,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:41:46,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487223300] [2019-11-07 01:41:46,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:41:46,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:41:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:41:46,276 INFO L87 Difference]: Start difference. First operand 4555 states and 7055 transitions. Second operand 6 states. [2019-11-07 01:41:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:47,711 INFO L93 Difference]: Finished difference Result 11122 states and 17797 transitions. [2019-11-07 01:41:47,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:47,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 207 [2019-11-07 01:41:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:47,757 INFO L225 Difference]: With dead ends: 11122 [2019-11-07 01:41:47,757 INFO L226 Difference]: Without dead ends: 6572 [2019-11-07 01:41:47,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:41:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2019-11-07 01:41:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 6528. [2019-11-07 01:41:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6528 states. [2019-11-07 01:41:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6528 states to 6528 states and 9917 transitions. [2019-11-07 01:41:47,996 INFO L78 Accepts]: Start accepts. Automaton has 6528 states and 9917 transitions. Word has length 207 [2019-11-07 01:41:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:47,997 INFO L462 AbstractCegarLoop]: Abstraction has 6528 states and 9917 transitions. [2019-11-07 01:41:47,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:41:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6528 states and 9917 transitions. [2019-11-07 01:41:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-07 01:41:48,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:48,017 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:48,017 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:48,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1573941140, now seen corresponding path program 1 times [2019-11-07 01:41:48,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:48,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332300411] [2019-11-07 01:41:48,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:41:48,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332300411] [2019-11-07 01:41:48,158 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494758992] [2019-11-07 01:41:48,159 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 [2019-11-07 01:41:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:48,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:41:48,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 01:41:48,594 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 62 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:41:48,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:48,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:41:48,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182465842] [2019-11-07 01:41:48,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:48,796 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:41:48,797 INFO L87 Difference]: Start difference. First operand 6528 states and 9917 transitions. Second operand 5 states. [2019-11-07 01:41:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:50,339 INFO L93 Difference]: Finished difference Result 18240 states and 29336 transitions. [2019-11-07 01:41:50,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:50,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2019-11-07 01:41:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:50,418 INFO L225 Difference]: With dead ends: 18240 [2019-11-07 01:41:50,418 INFO L226 Difference]: Without dead ends: 11717 [2019-11-07 01:41:50,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:41:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2019-11-07 01:41:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 11601. [2019-11-07 01:41:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11601 states. [2019-11-07 01:41:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11601 states to 11601 states and 17968 transitions. [2019-11-07 01:41:51,050 INFO L78 Accepts]: Start accepts. Automaton has 11601 states and 17968 transitions. Word has length 220 [2019-11-07 01:41:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:51,050 INFO L462 AbstractCegarLoop]: Abstraction has 11601 states and 17968 transitions. [2019-11-07 01:41:51,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11601 states and 17968 transitions. [2019-11-07 01:41:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-07 01:41:51,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:51,088 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:51,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:51,295 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:51,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1496195916, now seen corresponding path program 1 times [2019-11-07 01:41:51,296 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:51,297 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061139120] [2019-11-07 01:41:51,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:51,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061139120] [2019-11-07 01:41:51,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683619745] [2019-11-07 01:41:51,733 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 [2019-11-07 01:41:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:51,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:41:51,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 01:41:52,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:52,376 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-11-07 01:41:52,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:52,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:52,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:52,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:52,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 83 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:41:52,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:41:52,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 01:41:52,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741821033] [2019-11-07 01:41:52,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:41:52,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:52,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:41:52,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:41:52,558 INFO L87 Difference]: Start difference. First operand 11601 states and 17968 transitions. Second operand 5 states. [2019-11-07 01:41:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:53,866 INFO L93 Difference]: Finished difference Result 23255 states and 36222 transitions. [2019-11-07 01:41:53,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:41:53,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-11-07 01:41:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:53,917 INFO L225 Difference]: With dead ends: 23255 [2019-11-07 01:41:53,917 INFO L226 Difference]: Without dead ends: 11659 [2019-11-07 01:41:53,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-07 01:41:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2019-11-07 01:41:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11603. [2019-11-07 01:41:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11603 states. [2019-11-07 01:41:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11603 states to 11603 states and 17771 transitions. [2019-11-07 01:41:54,251 INFO L78 Accepts]: Start accepts. Automaton has 11603 states and 17771 transitions. Word has length 238 [2019-11-07 01:41:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:54,251 INFO L462 AbstractCegarLoop]: Abstraction has 11603 states and 17771 transitions. [2019-11-07 01:41:54,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:41:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11603 states and 17771 transitions. [2019-11-07 01:41:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-11-07 01:41:54,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:54,287 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:41:54,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:41:54,492 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 847642229, now seen corresponding path program 1 times [2019-11-07 01:41:54,493 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:54,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779579630] [2019-11-07 01:41:54,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:55,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779579630] [2019-11-07 01:41:55,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758955139] [2019-11-07 01:41:55,021 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 [2019-11-07 01:41:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:55,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 01:41:55,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:55,569 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:55,832 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2019-11-07 01:41:55,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:55,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:55,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:55,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:55,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:55,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 01:41:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:56,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776857640] [2019-11-07 01:41:56,200 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:41:56,201 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:56,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:56,216 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:56,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:56,623 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-11-07 01:41:58,539 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-11-07 01:41:59,167 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-07 01:41:59,357 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-07 01:41:59,558 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 227 [2019-11-07 01:42:00,259 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 373 [2019-11-07 01:42:00,562 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2019-11-07 01:42:00,900 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2019-11-07 01:42:01,309 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2019-11-07 01:42:01,519 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 172 for LOIs [2019-11-07 01:42:02,502 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 129 [2019-11-07 01:42:02,754 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-07 01:42:03,399 WARN L191 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 143