java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:42,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:42,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:42,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:42,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:42,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:42,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:42,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:42,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:42,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:42,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:42,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:42,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:42,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:42,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:42,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:42,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:42,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:42,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:42,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:42,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:42,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:42,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:42,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:42,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:00:42,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:00:42,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:00:42,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:00:42,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:00:42,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:00:42,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:42,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:42,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:42,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:42,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:42,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:42,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:42,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:42,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:42,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:42,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:42,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:00:42,528 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:42,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:42,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:42,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:42,537 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:42,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:42,538 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:42,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:42,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:42,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:42,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:42,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:42,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:42,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:42,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:42,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:42,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:42,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:42,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:42,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:42,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:42,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:42,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:42,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:42,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:42,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:42,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:42,857 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:42,857 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:42,858 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-10-13 18:00:42,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60be71ca2/1408d04c3c8246c0a7374fa5aed3f9a1/FLAG56cf41f14 [2019-10-13 18:00:43,543 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:43,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-10-13 18:00:43,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60be71ca2/1408d04c3c8246c0a7374fa5aed3f9a1/FLAG56cf41f14 [2019-10-13 18:00:43,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60be71ca2/1408d04c3c8246c0a7374fa5aed3f9a1 [2019-10-13 18:00:43,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:43,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:43,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:43,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:43,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:43,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:43" (1/1) ... [2019-10-13 18:00:43,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:43, skipping insertion in model container [2019-10-13 18:00:43,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:43" (1/1) ... [2019-10-13 18:00:43,778 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:43,835 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:44,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:44,548 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:44,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:44,789 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:44,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44 WrapperNode [2019-10-13 18:00:44,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:44,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:44,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:44,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:44,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... [2019-10-13 18:00:44,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:44,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:44,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:44,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:44,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:45,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:45,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:45,044 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:45,045 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:46,820 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:46,821 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:46,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:46 BoogieIcfgContainer [2019-10-13 18:00:46,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:46,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:46,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:46,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:46,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:43" (1/3) ... [2019-10-13 18:00:46,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c6c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:46, skipping insertion in model container [2019-10-13 18:00:46,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:44" (2/3) ... [2019-10-13 18:00:46,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128c6c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:46, skipping insertion in model container [2019-10-13 18:00:46,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:46" (3/3) ... [2019-10-13 18:00:46,837 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label47.c [2019-10-13 18:00:46,849 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:46,862 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:46,875 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:46,924 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:46,924 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:46,926 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:46,927 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:46,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:46,927 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:46,927 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:46,927 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 18:00:46,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:46,977 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:46,979 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1102823458, now seen corresponding path program 1 times [2019-10-13 18:00:46,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:46,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140253180] [2019-10-13 18:00:46,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:46,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:46,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:47,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140253180] [2019-10-13 18:00:47,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:47,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:47,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377350873] [2019-10-13 18:00:47,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:47,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:47,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:47,498 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:50,780 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-10-13 18:00:50,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:50,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-13 18:00:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:50,804 INFO L225 Difference]: With dead ends: 1004 [2019-10-13 18:00:50,804 INFO L226 Difference]: Without dead ends: 644 [2019-10-13 18:00:50,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-10-13 18:00:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-10-13 18:00:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 18:00:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-10-13 18:00:50,935 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 41 [2019-10-13 18:00:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:50,936 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-10-13 18:00:50,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-10-13 18:00:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 18:00:50,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:50,943 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:50,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -659313835, now seen corresponding path program 1 times [2019-10-13 18:00:50,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:50,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481059254] [2019-10-13 18:00:50,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:50,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:51,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481059254] [2019-10-13 18:00:51,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:51,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:00:51,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501699593] [2019-10-13 18:00:51,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:00:51,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:00:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:51,373 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-10-13 18:00:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:54,142 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-10-13 18:00:54,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:00:54,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-13 18:00:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:54,160 INFO L225 Difference]: With dead ends: 1867 [2019-10-13 18:00:54,160 INFO L226 Difference]: Without dead ends: 1250 [2019-10-13 18:00:54,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-10-13 18:00:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-10-13 18:00:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-10-13 18:00:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-10-13 18:00:54,235 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 116 [2019-10-13 18:00:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:54,238 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-10-13 18:00:54,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:00:54,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-10-13 18:00:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 18:00:54,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:54,253 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:54,254 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash -739175262, now seen corresponding path program 1 times [2019-10-13 18:00:54,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:54,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971828614] [2019-10-13 18:00:54,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:54,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:54,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:54,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971828614] [2019-10-13 18:00:54,626 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:54,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:00:54,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51256582] [2019-10-13 18:00:54,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:00:54,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:00:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:54,628 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-10-13 18:00:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:57,292 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-10-13 18:00:57,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:57,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-10-13 18:00:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:57,303 INFO L225 Difference]: With dead ends: 3063 [2019-10-13 18:00:57,303 INFO L226 Difference]: Without dead ends: 2049 [2019-10-13 18:00:57,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-10-13 18:00:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-10-13 18:00:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-10-13 18:00:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-10-13 18:00:57,369 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 129 [2019-10-13 18:00:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:57,369 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-10-13 18:00:57,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:00:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-10-13 18:00:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 18:00:57,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:57,373 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:57,374 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1324114650, now seen corresponding path program 1 times [2019-10-13 18:00:57,374 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:57,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269902701] [2019-10-13 18:00:57,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:57,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:57,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:57,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269902701] [2019-10-13 18:00:57,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979528172] [2019-10-13 18:00:57,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:57,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:57,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:57,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:57,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 18:00:57,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86250429] [2019-10-13 18:00:57,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:57,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:57,811 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-10-13 18:00:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:58,946 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-10-13 18:00:58,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:58,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-13 18:00:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:59,002 INFO L225 Difference]: With dead ends: 4442 [2019-10-13 18:00:59,003 INFO L226 Difference]: Without dead ends: 2814 [2019-10-13 18:00:59,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-10-13 18:00:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-10-13 18:00:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-10-13 18:00:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-10-13 18:00:59,107 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 172 [2019-10-13 18:00:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:59,108 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-10-13 18:00:59,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-10-13 18:00:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-13 18:00:59,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:59,115 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:59,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:59,330 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:59,333 INFO L82 PathProgramCache]: Analyzing trace with hash 951446006, now seen corresponding path program 1 times [2019-10-13 18:00:59,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:59,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891321419] [2019-10-13 18:00:59,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:59,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:59,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:59,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891321419] [2019-10-13 18:00:59,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083299763] [2019-10-13 18:00:59,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:59,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:59,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:00:59,904 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:59,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:00:59,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793606758] [2019-10-13 18:00:59,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:59,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:59,907 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 3 states. [2019-10-13 18:01:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:01,026 INFO L93 Difference]: Finished difference Result 7338 states and 10305 transitions. [2019-10-13 18:01:01,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:01,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2019-10-13 18:01:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:01,053 INFO L225 Difference]: With dead ends: 7338 [2019-10-13 18:01:01,053 INFO L226 Difference]: Without dead ends: 4723 [2019-10-13 18:01:01,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:01:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2019-10-13 18:01:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4721. [2019-10-13 18:01:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4721 states. [2019-10-13 18:01:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6255 transitions. [2019-10-13 18:01:01,191 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6255 transitions. Word has length 197 [2019-10-13 18:01:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:01,192 INFO L462 AbstractCegarLoop]: Abstraction has 4721 states and 6255 transitions. [2019-10-13 18:01:01,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6255 transitions. [2019-10-13 18:01:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-13 18:01:01,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:01,198 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:01,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:01,402 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash -163070871, now seen corresponding path program 1 times [2019-10-13 18:01:01,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:01,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412664812] [2019-10-13 18:01:01,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:01,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:01,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:01,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412664812] [2019-10-13 18:01:01,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991630392] [2019-10-13 18:01:01,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:01,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:01,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:01:01,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:01,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 18:01:01,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936310657] [2019-10-13 18:01:01,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:01,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:01,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:01,847 INFO L87 Difference]: Start difference. First operand 4721 states and 6255 transitions. Second operand 3 states. [2019-10-13 18:01:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:02,890 INFO L93 Difference]: Finished difference Result 11737 states and 16265 transitions. [2019-10-13 18:01:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:02,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-13 18:01:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:02,927 INFO L225 Difference]: With dead ends: 11737 [2019-10-13 18:01:02,928 INFO L226 Difference]: Without dead ends: 7210 [2019-10-13 18:01:02,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2019-10-13 18:01:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 6454. [2019-10-13 18:01:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6454 states. [2019-10-13 18:01:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 8601 transitions. [2019-10-13 18:01:03,119 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 8601 transitions. Word has length 202 [2019-10-13 18:01:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:03,119 INFO L462 AbstractCegarLoop]: Abstraction has 6454 states and 8601 transitions. [2019-10-13 18:01:03,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 8601 transitions. [2019-10-13 18:01:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:01:03,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:03,127 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:03,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:03,331 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1403985033, now seen corresponding path program 1 times [2019-10-13 18:01:03,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:03,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596323340] [2019-10-13 18:01:03,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:03,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:03,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:03,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596323340] [2019-10-13 18:01:03,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493167669] [2019-10-13 18:01:03,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:04,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:04,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:01:04,135 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:04,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-10-13 18:01:04,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909907155] [2019-10-13 18:01:04,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:04,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:04,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:01:04,139 INFO L87 Difference]: Start difference. First operand 6454 states and 8601 transitions. Second operand 3 states. [2019-10-13 18:01:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:05,234 INFO L93 Difference]: Finished difference Result 13865 states and 18941 transitions. [2019-10-13 18:01:05,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:01:05,234 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-10-13 18:01:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:05,269 INFO L225 Difference]: With dead ends: 13865 [2019-10-13 18:01:05,269 INFO L226 Difference]: Without dead ends: 7605 [2019-10-13 18:01:05,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:01:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2019-10-13 18:01:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 7417. [2019-10-13 18:01:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7417 states. [2019-10-13 18:01:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7417 states to 7417 states and 9886 transitions. [2019-10-13 18:01:05,472 INFO L78 Accepts]: Start accepts. Automaton has 7417 states and 9886 transitions. Word has length 230 [2019-10-13 18:01:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:05,473 INFO L462 AbstractCegarLoop]: Abstraction has 7417 states and 9886 transitions. [2019-10-13 18:01:05,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:01:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7417 states and 9886 transitions. [2019-10-13 18:01:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 18:01:05,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:05,483 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:05,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:05,688 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -196615596, now seen corresponding path program 1 times [2019-10-13 18:01:05,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:05,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295321007] [2019-10-13 18:01:05,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:05,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:05,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:06,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295321007] [2019-10-13 18:01:06,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645442510] [2019-10-13 18:01:06,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:06,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:01:06,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:06,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:06,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:01:06,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:06,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:06,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-13 18:01:06,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872625339] [2019-10-13 18:01:06,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:01:06,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:01:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:01:06,610 INFO L87 Difference]: Start difference. First operand 7417 states and 9886 transitions. Second operand 13 states. [2019-10-13 18:01:07,806 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2019-10-13 18:01:09,780 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-10-13 18:01:11,385 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-13 18:01:11,626 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2019-10-13 18:01:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:13,745 INFO L93 Difference]: Finished difference Result 15965 states and 22156 transitions. [2019-10-13 18:01:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 18:01:13,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 237 [2019-10-13 18:01:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:13,778 INFO L225 Difference]: With dead ends: 15965 [2019-10-13 18:01:13,778 INFO L226 Difference]: Without dead ends: 8546 [2019-10-13 18:01:13,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2019-10-13 18:01:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2019-10-13 18:01:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7863. [2019-10-13 18:01:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7863 states. [2019-10-13 18:01:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 9746 transitions. [2019-10-13 18:01:14,055 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 9746 transitions. Word has length 237 [2019-10-13 18:01:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:14,056 INFO L462 AbstractCegarLoop]: Abstraction has 7863 states and 9746 transitions. [2019-10-13 18:01:14,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:01:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 9746 transitions. [2019-10-13 18:01:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-10-13 18:01:14,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:14,068 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:14,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:14,272 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2125335593, now seen corresponding path program 1 times [2019-10-13 18:01:14,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:14,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200501505] [2019-10-13 18:01:14,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:14,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:14,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:14,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200501505] [2019-10-13 18:01:14,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074165403] [2019-10-13 18:01:14,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:14,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:01:14,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:14,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:01:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 18:01:15,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:15,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-10-13 18:01:15,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591588762] [2019-10-13 18:01:15,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:15,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:15,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:15,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:01:15,006 INFO L87 Difference]: Start difference. First operand 7863 states and 9746 transitions. Second operand 5 states. [2019-10-13 18:01:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:16,509 INFO L93 Difference]: Finished difference Result 15563 states and 19359 transitions. [2019-10-13 18:01:16,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:01:16,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2019-10-13 18:01:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:16,531 INFO L225 Difference]: With dead ends: 15563 [2019-10-13 18:01:16,532 INFO L226 Difference]: Without dead ends: 7894 [2019-10-13 18:01:16,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:01:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7894 states. [2019-10-13 18:01:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7894 to 7877. [2019-10-13 18:01:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7877 states. [2019-10-13 18:01:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 9754 transitions. [2019-10-13 18:01:16,696 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 9754 transitions. Word has length 280 [2019-10-13 18:01:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:16,697 INFO L462 AbstractCegarLoop]: Abstraction has 7877 states and 9754 transitions. [2019-10-13 18:01:16,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 9754 transitions. [2019-10-13 18:01:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-10-13 18:01:16,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:16,710 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:16,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:16,923 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:16,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1210048352, now seen corresponding path program 1 times [2019-10-13 18:01:16,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:16,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223331774] [2019-10-13 18:01:16,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:16,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:16,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:01:17,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223331774] [2019-10-13 18:01:17,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988189796] [2019-10-13 18:01:17,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:18,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 18:01:18,032 INFO L279 TraceCheckSpWp]: Computing forward predicates...