/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:10:02,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:10:02,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:10:02,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:10:02,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:10:02,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:10:02,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:10:02,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:10:02,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:10:02,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:10:02,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:10:02,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:10:02,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:10:02,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:10:02,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:10:02,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:10:02,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:10:02,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:10:02,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:10:02,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:10:02,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:10:02,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:10:02,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:10:02,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:10:02,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:10:02,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:10:02,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:10:02,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:10:02,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:10:02,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:10:02,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:10:02,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:10:02,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:10:02,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:10:02,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:10:02,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:10:02,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:10:02,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:10:02,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:10:02,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:10:02,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:10:02,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:10:02,597 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:10:02,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:10:02,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:10:02,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:10:02,602 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:10:02,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:10:02,602 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:10:02,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:10:02,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:10:02,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:10:02,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:10:02,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:10:02,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:10:02,608 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:10:02,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:10:02,608 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:10:02,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:10:02,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:10:02,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:10:02,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:10:02,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:10:02,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:10:02,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:10:02,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:10:02,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:10:02,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:10:02,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:10:02,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:10:02,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:10:02,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:10:02,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:10:02,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:10:02,913 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:10:02,914 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:10:02,915 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-11-06 19:10:02,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130448cfe/e0adbdc92c3140089ab3f615cf24965b/FLAGf9ad214ca [2019-11-06 19:10:03,646 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:10:03,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-11-06 19:10:03,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130448cfe/e0adbdc92c3140089ab3f615cf24965b/FLAGf9ad214ca [2019-11-06 19:10:03,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130448cfe/e0adbdc92c3140089ab3f615cf24965b [2019-11-06 19:10:03,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:10:03,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:10:03,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:03,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:10:03,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:10:03,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:03" (1/1) ... [2019-11-06 19:10:03,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56810a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:03, skipping insertion in model container [2019-11-06 19:10:03,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:03" (1/1) ... [2019-11-06 19:10:03,876 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:10:03,936 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:10:04,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:04,645 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:10:04,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:04,857 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:10:04,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04 WrapperNode [2019-11-06 19:10:04,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:04,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:10:04,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:10:04,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:10:04,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:04,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:04,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:04,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:04,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:05,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:05,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... [2019-11-06 19:10:05,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:10:05,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:10:05,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:10:05,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:10:05,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:10:05,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:10:05,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:10:05,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:10:05,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:10:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:10:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:10:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:10:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:10:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:10:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:10:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:10:07,082 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:10:07,085 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:10:07,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:07 BoogieIcfgContainer [2019-11-06 19:10:07,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:10:07,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:10:07,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:10:07,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:10:07,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:10:03" (1/3) ... [2019-11-06 19:10:07,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b82fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:07, skipping insertion in model container [2019-11-06 19:10:07,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:04" (2/3) ... [2019-11-06 19:10:07,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b82fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:07, skipping insertion in model container [2019-11-06 19:10:07,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:07" (3/3) ... [2019-11-06 19:10:07,102 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label51.c [2019-11-06 19:10:07,114 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:10:07,124 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:10:07,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:10:07,185 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:10:07,185 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:10:07,186 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:10:07,187 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:10:07,187 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:10:07,187 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:10:07,187 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:10:07,187 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:10:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:10:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 19:10:07,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:07,232 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:07,235 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:07,241 INFO L82 PathProgramCache]: Analyzing trace with hash 234227266, now seen corresponding path program 1 times [2019-11-06 19:10:07,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:07,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356028516] [2019-11-06 19:10:07,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:07,624 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356028516] [2019-11-06 19:10:07,625 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:07,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:10:07,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11407772] [2019-11-06 19:10:07,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:07,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:07,658 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:10:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:11,072 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-11-06 19:10:11,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:11,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-06 19:10:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:11,095 INFO L225 Difference]: With dead ends: 987 [2019-11-06 19:10:11,096 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 19:10:11,105 INFO L630 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 [2019-11-06 19:10:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 19:10:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-11-06 19:10:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-06 19:10:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-11-06 19:10:11,195 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 17 [2019-11-06 19:10:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:11,196 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-11-06 19:10:11,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-11-06 19:10:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 19:10:11,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:11,201 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:11,201 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash -904309470, now seen corresponding path program 1 times [2019-11-06 19:10:11,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:11,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245525553] [2019-11-06 19:10:11,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:11,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245525553] [2019-11-06 19:10:11,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:11,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:10:11,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939823008] [2019-11-06 19:10:11,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:10:11,655 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:10:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:10:11,656 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-11-06 19:10:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:14,903 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-11-06 19:10:14,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:10:14,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2019-11-06 19:10:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:14,914 INFO L225 Difference]: With dead ends: 1652 [2019-11-06 19:10:14,915 INFO L226 Difference]: Without dead ends: 1232 [2019-11-06 19:10:14,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:10:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-11-06 19:10:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-11-06 19:10:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-11-06 19:10:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1683 transitions. [2019-11-06 19:10:14,998 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1683 transitions. Word has length 89 [2019-11-06 19:10:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:15,000 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1683 transitions. [2019-11-06 19:10:15,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:10:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1683 transitions. [2019-11-06 19:10:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 19:10:15,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:15,005 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:15,005 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:15,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1508869126, now seen corresponding path program 1 times [2019-11-06 19:10:15,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:15,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122764846] [2019-11-06 19:10:15,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:15,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122764846] [2019-11-06 19:10:15,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780972346] [2019-11-06 19:10:15,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:10:15,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:15,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:15,520 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:15,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:10:15,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235468035] [2019-11-06 19:10:15,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:15,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:10:15,528 INFO L87 Difference]: Start difference. First operand 1203 states and 1683 transitions. Second operand 5 states. [2019-11-06 19:10:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:17,202 INFO L93 Difference]: Finished difference Result 3024 states and 4220 transitions. [2019-11-06 19:10:17,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:10:17,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-06 19:10:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:17,227 INFO L225 Difference]: With dead ends: 3024 [2019-11-06 19:10:17,227 INFO L226 Difference]: Without dead ends: 1827 [2019-11-06 19:10:17,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:10:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2019-11-06 19:10:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1797. [2019-11-06 19:10:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2019-11-06 19:10:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2348 transitions. [2019-11-06 19:10:17,352 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2348 transitions. Word has length 91 [2019-11-06 19:10:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:17,353 INFO L462 AbstractCegarLoop]: Abstraction has 1797 states and 2348 transitions. [2019-11-06 19:10:17,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2348 transitions. [2019-11-06 19:10:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 19:10:17,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:17,369 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:17,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:17,576 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1685901178, now seen corresponding path program 1 times [2019-11-06 19:10:17,576 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:17,576 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691682641] [2019-11-06 19:10:17,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:17,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691682641] [2019-11-06 19:10:17,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194827074] [2019-11-06 19:10:17,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:17,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:17,994 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:17,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:10:17,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327889303] [2019-11-06 19:10:17,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:17,998 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:10:17,999 INFO L87 Difference]: Start difference. First operand 1797 states and 2348 transitions. Second operand 3 states. [2019-11-06 19:10:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:19,161 INFO L93 Difference]: Finished difference Result 3984 states and 5324 transitions. [2019-11-06 19:10:19,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:19,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-11-06 19:10:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:19,189 INFO L225 Difference]: With dead ends: 3984 [2019-11-06 19:10:19,190 INFO L226 Difference]: Without dead ends: 2381 [2019-11-06 19:10:19,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:10:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-11-06 19:10:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2180. [2019-11-06 19:10:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2180 states. [2019-11-06 19:10:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 2817 transitions. [2019-11-06 19:10:19,304 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 2817 transitions. Word has length 148 [2019-11-06 19:10:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:19,306 INFO L462 AbstractCegarLoop]: Abstraction has 2180 states and 2817 transitions. [2019-11-06 19:10:19,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 2817 transitions. [2019-11-06 19:10:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 19:10:19,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:19,316 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:19,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:19,573 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash 760632652, now seen corresponding path program 1 times [2019-11-06 19:10:19,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:19,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511367521] [2019-11-06 19:10:19,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:10:19,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511367521] [2019-11-06 19:10:19,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765997606] [2019-11-06 19:10:19,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:19,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:10:19,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:19,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:19,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:19,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:19,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:19,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:19,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:20,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:20,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:22,280 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 16 [2019-11-06 19:10:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:10:22,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:10:22,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2019-11-06 19:10:22,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129321870] [2019-11-06 19:10:22,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:10:22,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:22,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:10:22,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2019-11-06 19:10:22,344 INFO L87 Difference]: Start difference. First operand 2180 states and 2817 transitions. Second operand 8 states.