java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:11,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:11,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:11,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:11,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:11,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:11,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:11,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:11,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:11,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:11,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:11,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:11,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:11,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:11,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:11,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:11,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:11,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:11,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:11,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:11,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:11,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:11,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:11,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:11,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:11,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:11,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:11,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:11,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:02:11,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:11,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:11,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:11,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:11,317 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:11,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:11,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:11,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:11,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:11,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:11,319 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:11,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:11,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:11,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:11,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:11,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:11,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:11,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:11,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:11,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:11,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:11,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:11,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:11,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:11,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:11,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:11,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:11,618 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:11,618 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:11,619 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-14 22:02:11,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d347e7c00/c56fb38faac24236b0927de04f8997f1/FLAG86a28cddc [2019-10-14 22:02:12,309 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:12,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-14 22:02:12,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d347e7c00/c56fb38faac24236b0927de04f8997f1/FLAG86a28cddc [2019-10-14 22:02:12,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d347e7c00/c56fb38faac24236b0927de04f8997f1 [2019-10-14 22:02:12,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:12,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:12,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:12,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:12,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:12,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:12" (1/1) ... [2019-10-14 22:02:12,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:12, skipping insertion in model container [2019-10-14 22:02:12,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:12" (1/1) ... [2019-10-14 22:02:12,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:12,633 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:13,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:13,232 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:13,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:13,394 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:13,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13 WrapperNode [2019-10-14 22:02:13,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:13,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:13,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:13,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:13,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:13,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:13,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:13,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:13,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:13,683 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:13,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:13,684 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:15,386 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:15,388 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:15,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:15 BoogieIcfgContainer [2019-10-14 22:02:15,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:15,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:15,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:15,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:15,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:12" (1/3) ... [2019-10-14 22:02:15,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:15, skipping insertion in model container [2019-10-14 22:02:15,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13" (2/3) ... [2019-10-14 22:02:15,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:15, skipping insertion in model container [2019-10-14 22:02:15,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:15" (3/3) ... [2019-10-14 22:02:15,399 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2019-10-14 22:02:15,410 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:15,420 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:15,432 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:15,462 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:15,463 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:15,463 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:15,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:15,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:15,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:15,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:15,464 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 22:02:15,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:15,497 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:15,499 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -989093190, now seen corresponding path program 1 times [2019-10-14 22:02:15,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:15,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-14 22:02:15,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:15,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-14 22:02:15,812 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:15,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:15,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860706163] [2019-10-14 22:02:15,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:15,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:15,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:15,836 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:18,676 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-14 22:02:18,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:18,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-14 22:02:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:18,699 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:02:18,699 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:18,710 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 [2019-10-14 22:02:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-14 22:02:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-14 22:02:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-14 22:02:18,797 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 17 [2019-10-14 22:02:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:18,797 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-14 22:02:18,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-14 22:02:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 22:02:18,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:18,811 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:18,812 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash 649942285, now seen corresponding path program 1 times [2019-10-14 22:02:18,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:18,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832701429] [2019-10-14 22:02:18,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:19,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832701429] [2019-10-14 22:02:19,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475182584] [2019-10-14 22:02:19,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:19,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:19,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:19,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:19,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471689230] [2019-10-14 22:02:19,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:19,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:19,300 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-14 22:02:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:20,163 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-10-14 22:02:20,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:20,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-14 22:02:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:20,171 INFO L225 Difference]: With dead ends: 1114 [2019-10-14 22:02:20,171 INFO L226 Difference]: Without dead ends: 744 [2019-10-14 22:02:20,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-14 22:02:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-14 22:02:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-14 22:02:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-10-14 22:02:20,220 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 100 [2019-10-14 22:02:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,221 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-10-14 22:02:20,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-10-14 22:02:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 22:02:20,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,224 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:20,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:20,431 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:20,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2036174565, now seen corresponding path program 1 times [2019-10-14 22:02:20,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:20,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39593020] [2019-10-14 22:02:20,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:20,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39593020] [2019-10-14 22:02:20,935 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:20,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 22:02:20,936 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357255493] [2019-10-14 22:02:20,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 22:02:20,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:20,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 22:02:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:20,938 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 10 states. [2019-10-14 22:02:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:23,496 INFO L93 Difference]: Finished difference Result 2058 states and 2654 transitions. [2019-10-14 22:02:23,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 22:02:23,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 112 [2019-10-14 22:02:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:23,505 INFO L225 Difference]: With dead ends: 2058 [2019-10-14 22:02:23,506 INFO L226 Difference]: Without dead ends: 1320 [2019-10-14 22:02:23,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2019-10-14 22:02:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1122. [2019-10-14 22:02:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1122 states. [2019-10-14 22:02:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1418 transitions. [2019-10-14 22:02:23,563 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1418 transitions. Word has length 112 [2019-10-14 22:02:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:23,563 INFO L462 AbstractCegarLoop]: Abstraction has 1122 states and 1418 transitions. [2019-10-14 22:02:23,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 22:02:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1418 transitions. [2019-10-14 22:02:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 22:02:23,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:23,567 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:23,567 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1995624033, now seen corresponding path program 1 times [2019-10-14 22:02:23,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:23,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11378174] [2019-10-14 22:02:23,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:02:23,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11378174] [2019-10-14 22:02:23,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559558984] [2019-10-14 22:02:23,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:23,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:23,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:23,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:23,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813674739] [2019-10-14 22:02:23,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:23,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:23,974 INFO L87 Difference]: Start difference. First operand 1122 states and 1418 transitions. Second operand 3 states. [2019-10-14 22:02:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:24,740 INFO L93 Difference]: Finished difference Result 1676 states and 2187 transitions. [2019-10-14 22:02:24,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:24,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-14 22:02:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:24,749 INFO L225 Difference]: With dead ends: 1676 [2019-10-14 22:02:24,750 INFO L226 Difference]: Without dead ends: 1674 [2019-10-14 22:02:24,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2019-10-14 22:02:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1308. [2019-10-14 22:02:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2019-10-14 22:02:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1736 transitions. [2019-10-14 22:02:24,821 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1736 transitions. Word has length 126 [2019-10-14 22:02:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:24,822 INFO L462 AbstractCegarLoop]: Abstraction has 1308 states and 1736 transitions. [2019-10-14 22:02:24,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1736 transitions. [2019-10-14 22:02:24,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 22:02:24,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:24,826 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:25,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:25,030 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1918057, now seen corresponding path program 1 times [2019-10-14 22:02:25,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:25,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257735868] [2019-10-14 22:02:25,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:25,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:25,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:02:25,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257735868] [2019-10-14 22:02:25,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764297145] [2019-10-14 22:02:25,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:25,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 22:02:25,395 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:25,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:25,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287911932] [2019-10-14 22:02:25,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:25,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:25,397 INFO L87 Difference]: Start difference. First operand 1308 states and 1736 transitions. Second operand 5 states. [2019-10-14 22:02:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:26,663 INFO L93 Difference]: Finished difference Result 3396 states and 4755 transitions. [2019-10-14 22:02:26,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:26,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-10-14 22:02:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:26,689 INFO L225 Difference]: With dead ends: 3396 [2019-10-14 22:02:26,689 INFO L226 Difference]: Without dead ends: 2094 [2019-10-14 22:02:26,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-10-14 22:02:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2062. [2019-10-14 22:02:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2019-10-14 22:02:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2698 transitions. [2019-10-14 22:02:26,779 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2698 transitions. Word has length 182 [2019-10-14 22:02:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:26,780 INFO L462 AbstractCegarLoop]: Abstraction has 2062 states and 2698 transitions. [2019-10-14 22:02:26,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2698 transitions. [2019-10-14 22:02:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 22:02:26,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:26,786 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:26,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:26,991 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1202443494, now seen corresponding path program 1 times [2019-10-14 22:02:26,992 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:26,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032071428] [2019-10-14 22:02:26,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:27,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032071428] [2019-10-14 22:02:27,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650049154] [2019-10-14 22:02:27,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:27,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:27,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 22:02:28,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:28,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-14 22:02:28,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741382727] [2019-10-14 22:02:28,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:28,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:28,014 INFO L87 Difference]: Start difference. First operand 2062 states and 2698 transitions. Second operand 5 states. [2019-10-14 22:02:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:29,353 INFO L93 Difference]: Finished difference Result 4868 states and 6267 transitions. [2019-10-14 22:02:29,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:29,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-14 22:02:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:29,366 INFO L225 Difference]: With dead ends: 4868 [2019-10-14 22:02:29,367 INFO L226 Difference]: Without dead ends: 2812 [2019-10-14 22:02:29,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:02:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2019-10-14 22:02:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2434. [2019-10-14 22:02:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2019-10-14 22:02:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2019-10-14 22:02:29,441 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 185 [2019-10-14 22:02:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:29,442 INFO L462 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2019-10-14 22:02:29,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2019-10-14 22:02:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 22:02:29,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:29,446 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:29,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,650 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -438667603, now seen corresponding path program 1 times [2019-10-14 22:02:29,651 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:29,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141230433] [2019-10-14 22:02:29,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:30,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141230433] [2019-10-14 22:02:30,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265945969] [2019-10-14 22:02:30,465 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 [2019-10-14 22:02:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:30,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:30,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 51 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:30,705 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:30,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-14 22:02:30,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6332770] [2019-10-14 22:02:30,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:30,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:30,707 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand 16 states. [2019-10-14 22:02:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:33,930 INFO L93 Difference]: Finished difference Result 5358 states and 6839 transitions. [2019-10-14 22:02:33,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 22:02:33,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 196 [2019-10-14 22:02:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:33,941 INFO L225 Difference]: With dead ends: 5358 [2019-10-14 22:02:33,941 INFO L226 Difference]: Without dead ends: 2883 [2019-10-14 22:02:33,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-10-14 22:02:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2019-10-14 22:02:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2802. [2019-10-14 22:02:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2019-10-14 22:02:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3301 transitions. [2019-10-14 22:02:34,034 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3301 transitions. Word has length 196 [2019-10-14 22:02:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:34,036 INFO L462 AbstractCegarLoop]: Abstraction has 2802 states and 3301 transitions. [2019-10-14 22:02:34,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3301 transitions. [2019-10-14 22:02:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-14 22:02:34,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:34,039 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:34,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:34,251 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash 629311762, now seen corresponding path program 1 times [2019-10-14 22:02:34,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:34,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060456184] [2019-10-14 22:02:34,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:34,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:34,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:34,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060456184] [2019-10-14 22:02:34,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49104063] [2019-10-14 22:02:34,429 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 [2019-10-14 22:02:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:34,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:34,547 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:34,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:34,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232848684] [2019-10-14 22:02:34,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:34,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:34,549 INFO L87 Difference]: Start difference. First operand 2802 states and 3301 transitions. Second operand 3 states. [2019-10-14 22:02:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:35,175 INFO L93 Difference]: Finished difference Result 6336 states and 7506 transitions. [2019-10-14 22:02:35,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:35,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2019-10-14 22:02:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:35,188 INFO L225 Difference]: With dead ends: 6336 [2019-10-14 22:02:35,188 INFO L226 Difference]: Without dead ends: 3356 [2019-10-14 22:02:35,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2019-10-14 22:02:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2618. [2019-10-14 22:02:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2618 states. [2019-10-14 22:02:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3077 transitions. [2019-10-14 22:02:35,267 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3077 transitions. Word has length 199 [2019-10-14 22:02:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:35,268 INFO L462 AbstractCegarLoop]: Abstraction has 2618 states and 3077 transitions. [2019-10-14 22:02:35,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3077 transitions. [2019-10-14 22:02:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-14 22:02:35,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:35,272 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:35,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:35,484 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1137862238, now seen corresponding path program 1 times [2019-10-14 22:02:35,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:35,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107543668] [2019-10-14 22:02:35,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:36,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107543668] [2019-10-14 22:02:36,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33438444] [2019-10-14 22:02:36,442 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 [2019-10-14 22:02:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:36,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:36,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 22:02:36,667 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:36,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-10-14 22:02:36,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956270537] [2019-10-14 22:02:36,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:36,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:36,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:36,674 INFO L87 Difference]: Start difference. First operand 2618 states and 3077 transitions. Second operand 5 states. [2019-10-14 22:02:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:37,813 INFO L93 Difference]: Finished difference Result 5440 states and 6574 transitions. [2019-10-14 22:02:37,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:37,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-10-14 22:02:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:37,827 INFO L225 Difference]: With dead ends: 5440 [2019-10-14 22:02:37,827 INFO L226 Difference]: Without dead ends: 3194 [2019-10-14 22:02:37,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-14 22:02:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2019-10-14 22:02:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3008. [2019-10-14 22:02:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2019-10-14 22:02:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 3552 transitions. [2019-10-14 22:02:37,895 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 3552 transitions. Word has length 221 [2019-10-14 22:02:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:37,896 INFO L462 AbstractCegarLoop]: Abstraction has 3008 states and 3552 transitions. [2019-10-14 22:02:37,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 3552 transitions. [2019-10-14 22:02:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-10-14 22:02:37,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:37,901 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:38,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:38,106 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1035337430, now seen corresponding path program 1 times [2019-10-14 22:02:38,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:38,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319005928] [2019-10-14 22:02:38,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:38,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:38,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 134 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-14 22:02:38,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319005928] [2019-10-14 22:02:38,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967005479] [2019-10-14 22:02:38,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:38,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:38,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-14 22:02:39,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:39,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 22:02:39,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911373738] [2019-10-14 22:02:39,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:02:39,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:02:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:39,054 INFO L87 Difference]: Start difference. First operand 3008 states and 3552 transitions. Second operand 13 states. [2019-10-14 22:02:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:42,896 INFO L93 Difference]: Finished difference Result 5858 states and 7044 transitions. [2019-10-14 22:02:42,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 22:02:42,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 331 [2019-10-14 22:02:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:42,907 INFO L225 Difference]: With dead ends: 5858 [2019-10-14 22:02:42,908 INFO L226 Difference]: Without dead ends: 3038 [2019-10-14 22:02:42,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 22:02:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2019-10-14 22:02:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 3014. [2019-10-14 22:02:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3014 states. [2019-10-14 22:02:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 3465 transitions. [2019-10-14 22:02:42,981 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 3465 transitions. Word has length 331 [2019-10-14 22:02:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:42,981 INFO L462 AbstractCegarLoop]: Abstraction has 3014 states and 3465 transitions. [2019-10-14 22:02:42,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:02:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 3465 transitions. [2019-10-14 22:02:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-10-14 22:02:42,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:42,990 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:43,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:43,194 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash -854069146, now seen corresponding path program 1 times [2019-10-14 22:02:43,195 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:43,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729039547] [2019-10-14 22:02:43,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 22:02:43,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729039547] [2019-10-14 22:02:43,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925528372] [2019-10-14 22:02:43,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:43,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:43,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:43,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:43,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233801219] [2019-10-14 22:02:43,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:43,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:43,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:43,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:43,885 INFO L87 Difference]: Start difference. First operand 3014 states and 3465 transitions. Second operand 3 states. [2019-10-14 22:02:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:44,525 INFO L93 Difference]: Finished difference Result 3744 states and 4308 transitions. [2019-10-14 22:02:44,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:44,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 409 [2019-10-14 22:02:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:44,538 INFO L225 Difference]: With dead ends: 3744 [2019-10-14 22:02:44,538 INFO L226 Difference]: Without dead ends: 3742 [2019-10-14 22:02:44,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2019-10-14 22:02:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3196. [2019-10-14 22:02:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3196 states. [2019-10-14 22:02:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 3673 transitions. [2019-10-14 22:02:44,602 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 3673 transitions. Word has length 409 [2019-10-14 22:02:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:44,602 INFO L462 AbstractCegarLoop]: Abstraction has 3196 states and 3673 transitions. [2019-10-14 22:02:44,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 3673 transitions. [2019-10-14 22:02:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2019-10-14 22:02:44,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:44,612 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:44,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:44,819 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -62690190, now seen corresponding path program 1 times [2019-10-14 22:02:44,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:44,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792102872] [2019-10-14 22:02:44,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 317 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-14 22:02:45,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792102872] [2019-10-14 22:02:45,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005263823] [2019-10-14 22:02:45,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:45,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:45,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-14 22:02:46,084 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:46,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:46,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141961188] [2019-10-14 22:02:46,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:46,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:46,086 INFO L87 Difference]: Start difference. First operand 3196 states and 3673 transitions. Second operand 12 states.