/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/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:59,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:59,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:59,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:16:59,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:16:59,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:16:59,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:16:59,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:16:59,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:16:59,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:16:59,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:16:59,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:16:59,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:59,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:59,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:59,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:59,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:59,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:59,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:59,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:59,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:59,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:59,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:59,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:59,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:16:59,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:16:59,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:16:59,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:16:59,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:16:59,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:16:59,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:16:59,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:16:59,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:16:59,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:16:59,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:16:59,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:16:59,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:16:59,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:16:59,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:59,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:59,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:59,505 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 19:16:59,527 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:59,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:59,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:59,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:59,531 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:59,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:59,532 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:59,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:59,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:59,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:59,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:59,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:59,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:59,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:59,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:59,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:59,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:59,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:59,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:59,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:59,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:59,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:59,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:59,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:59,816 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:59,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:59,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:59,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:59,839 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:59,840 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-11-06 19:16:59,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae75d72b/c112d5f40c304bf7b7a50b38c6a16c90/FLAG3f0f00000 [2019-11-06 19:17:00,551 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:00,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-11-06 19:17:00,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae75d72b/c112d5f40c304bf7b7a50b38c6a16c90/FLAG3f0f00000 [2019-11-06 19:17:00,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae75d72b/c112d5f40c304bf7b7a50b38c6a16c90 [2019-11-06 19:17:00,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:00,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:00,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:00,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:00,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:00,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:00" (1/1) ... [2019-11-06 19:17:00,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed1c93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:00, skipping insertion in model container [2019-11-06 19:17:00,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:00" (1/1) ... [2019-11-06 19:17:00,762 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:00,849 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:01,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:01,909 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:02,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:02,163 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:02,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02 WrapperNode [2019-11-06 19:17:02,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:02,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:02,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:02,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:02,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (1/1) ... [2019-11-06 19:17:02,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:02,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:02,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:02,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:02,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (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 19:17:02,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:02,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:02,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:02,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:02,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:04,875 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:04,875 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:04,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:04 BoogieIcfgContainer [2019-11-06 19:17:04,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:04,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:04,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:04,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:04,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:00" (1/3) ... [2019-11-06 19:17:04,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57033243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:04, skipping insertion in model container [2019-11-06 19:17:04,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:02" (2/3) ... [2019-11-06 19:17:04,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57033243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:04, skipping insertion in model container [2019-11-06 19:17:04,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:04" (3/3) ... [2019-11-06 19:17:04,885 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-11-06 19:17:04,895 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:04,905 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:04,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:04,958 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:04,958 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:04,959 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:04,959 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:04,959 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:04,959 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:04,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:04,960 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 19:17:05,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:05,013 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:05,014 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-11-06 19:17:05,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:05,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322315709] [2019-11-06 19:17:05,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:05,372 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 19:17:05,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322315709] [2019-11-06 19:17:05,373 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:05,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:05,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743749571] [2019-11-06 19:17:05,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:05,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:05,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:05,396 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:10,567 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-11-06 19:17:10,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:10,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-11-06 19:17:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:10,611 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:10,612 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:10,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-11-06 19:17:10,787 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 60 [2019-11-06 19:17:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:10,788 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-11-06 19:17:10,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-11-06 19:17:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 19:17:10,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:10,796 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 19:17:10,796 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-11-06 19:17:10,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:10,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587009414] [2019-11-06 19:17:10,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:11,166 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587009414] [2019-11-06 19:17:11,167 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:11,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:17:11,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703188209] [2019-11-06 19:17:11,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:17:11,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:17:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:17:11,170 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-11-06 19:17:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:19,034 INFO L93 Difference]: Finished difference Result 3898 states and 6463 transitions. [2019-11-06 19:17:19,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:17:19,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-11-06 19:17:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:19,058 INFO L225 Difference]: With dead ends: 3898 [2019-11-06 19:17:19,058 INFO L226 Difference]: Without dead ends: 2873 [2019-11-06 19:17:19,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:17:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2019-11-06 19:17:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2811. [2019-11-06 19:17:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-11-06 19:17:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-11-06 19:17:19,197 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 135 [2019-11-06 19:17:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:19,200 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-11-06 19:17:19,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:17:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-11-06 19:17:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 19:17:19,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:19,215 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:19,215 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-11-06 19:17:19,216 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:19,216 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690360152] [2019-11-06 19:17:19,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:19,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690360152] [2019-11-06 19:17:19,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:19,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:17:19,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358005036] [2019-11-06 19:17:19,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:17:19,465 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:17:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:19,466 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-11-06 19:17:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:25,209 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-11-06 19:17:25,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:17:25,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2019-11-06 19:17:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:25,269 INFO L225 Difference]: With dead ends: 9864 [2019-11-06 19:17:25,269 INFO L226 Difference]: Without dead ends: 7059 [2019-11-06 19:17:25,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:17:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-11-06 19:17:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-11-06 19:17:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-11-06 19:17:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10407 transitions. [2019-11-06 19:17:25,522 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10407 transitions. Word has length 139 [2019-11-06 19:17:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:25,524 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10407 transitions. [2019-11-06 19:17:25,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:17:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10407 transitions. [2019-11-06 19:17:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:17:25,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:25,529 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:25,530 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-11-06 19:17:25,530 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:25,531 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920163964] [2019-11-06 19:17:25,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:17:25,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920163964] [2019-11-06 19:17:25,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111623542] [2019-11-06 19:17:25,914 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 19:17:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:26,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:26,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:26,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:26,199 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:17:26,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845275380] [2019-11-06 19:17:26,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:26,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:26,203 INFO L87 Difference]: Start difference. First operand 7025 states and 10407 transitions. Second operand 11 states. [2019-11-06 19:17:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:30,856 INFO L93 Difference]: Finished difference Result 17510 states and 26759 transitions. [2019-11-06 19:17:30,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:17:30,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2019-11-06 19:17:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:30,911 INFO L225 Difference]: With dead ends: 17510 [2019-11-06 19:17:30,912 INFO L226 Difference]: Without dead ends: 10491 [2019-11-06 19:17:30,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:17:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-11-06 19:17:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8063. [2019-11-06 19:17:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8063 states. [2019-11-06 19:17:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 11784 transitions. [2019-11-06 19:17:31,191 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 11784 transitions. Word has length 234 [2019-11-06 19:17:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:31,193 INFO L462 AbstractCegarLoop]: Abstraction has 8063 states and 11784 transitions. [2019-11-06 19:17:31,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:17:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 11784 transitions. [2019-11-06 19:17:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-06 19:17:31,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:31,202 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 19:17:31,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:31,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:31,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1136292925, now seen corresponding path program 1 times [2019-11-06 19:17:31,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:31,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680236659] [2019-11-06 19:17:31,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 106 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:17:31,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680236659] [2019-11-06 19:17:31,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614298817] [2019-11-06 19:17:31,922 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 19:17:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:32,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:17:32,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 19:17:32,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:32,361 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:17:32,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862045688] [2019-11-06 19:17:32,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:32,363 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:32,364 INFO L87 Difference]: Start difference. First operand 8063 states and 11784 transitions. Second operand 5 states. [2019-11-06 19:17:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:35,188 INFO L93 Difference]: Finished difference Result 18225 states and 26754 transitions. [2019-11-06 19:17:35,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:17:35,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2019-11-06 19:17:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:35,237 INFO L225 Difference]: With dead ends: 18225 [2019-11-06 19:17:35,238 INFO L226 Difference]: Without dead ends: 10168 [2019-11-06 19:17:35,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:17:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2019-11-06 19:17:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 9101. [2019-11-06 19:17:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9101 states. [2019-11-06 19:17:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9101 states to 9101 states and 12176 transitions. [2019-11-06 19:17:35,507 INFO L78 Accepts]: Start accepts. Automaton has 9101 states and 12176 transitions. Word has length 310 [2019-11-06 19:17:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:35,508 INFO L462 AbstractCegarLoop]: Abstraction has 9101 states and 12176 transitions. [2019-11-06 19:17:35,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 9101 states and 12176 transitions. [2019-11-06 19:17:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-11-06 19:17:35,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:35,522 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:17:35,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:35,728 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1283701567, now seen corresponding path program 1 times [2019-11-06 19:17:35,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:35,729 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723465331] [2019-11-06 19:17:35,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:17:36,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723465331] [2019-11-06 19:17:36,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028149495] [2019-11-06 19:17:36,458 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 19:17:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:36,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:17:36,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:36,784 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:17:36,785 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:17:36,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168716247] [2019-11-06 19:17:36,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:17:36,786 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:36,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:17:36,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:36,787 INFO L87 Difference]: Start difference. First operand 9101 states and 12176 transitions. Second operand 11 states.