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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:08:16,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:08:16,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:08:16,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:08:16,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:08:16,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:08:16,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:08:16,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:08:16,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:08:16,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:08:16,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:08:16,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:08:16,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:08:16,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:08:16,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:08:16,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:08:16,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:08:16,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:08:16,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:08:16,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:08:16,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 19:08:16,825 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:08:16,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:08:16,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:08:16,826 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:08:16,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:08:16,827 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:08:16,827 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:08:16,827 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:08:16,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:08:16,828 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:08:16,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:08:16,829 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:08:16,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:08:16,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:08:16,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:08:16,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:08:16,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:08:16,830 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:08:16,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:08:16,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:08:16,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:08:16,831 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:08:16,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:08:16,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:08:16,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:08:16,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:08:16,832 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:08:16,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:08:16,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:08:16,832 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:08:16,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:08:16,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:08:16,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:08:16,888 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:08:16,888 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:08:16,889 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2019-09-09 19:08:16,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097637b0d/a6dbb169dcd24061acb03cda220c6df3/FLAG3fb41a553 [2019-09-09 19:08:17,672 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:08:17,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2019-09-09 19:08:17,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097637b0d/a6dbb169dcd24061acb03cda220c6df3/FLAG3fb41a553 [2019-09-09 19:08:17,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097637b0d/a6dbb169dcd24061acb03cda220c6df3 [2019-09-09 19:08:17,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:08:17,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:08:17,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:08:17,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:08:17,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:08:17,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:08:17" (1/1) ... [2019-09-09 19:08:17,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3540d15a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:17, skipping insertion in model container [2019-09-09 19:08:17,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:08:17" (1/1) ... [2019-09-09 19:08:17,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:08:17,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:08:18,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:08:18,964 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:08:19,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:08:19,290 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:08:19,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19 WrapperNode [2019-09-09 19:08:19,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:08:19,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:08:19,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:08:19,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:08:19,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (1/1) ... [2019-09-09 19:08:19,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:08:19,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:08:19,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:08:19,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:08:19,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (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 [2019-09-09 19:08:19,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:08:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:08:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:08:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:08:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:08:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:08:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:08:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:08:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:08:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:08:19,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:08:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:08:19,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:08:23,568 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:08:23,569 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:08:23,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:08:23 BoogieIcfgContainer [2019-09-09 19:08:23,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:08:23,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:08:23,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:08:23,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:08:23,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:08:17" (1/3) ... [2019-09-09 19:08:23,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a88ff9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:08:23, skipping insertion in model container [2019-09-09 19:08:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:08:19" (2/3) ... [2019-09-09 19:08:23,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a88ff9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:08:23, skipping insertion in model container [2019-09-09 19:08:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:08:23" (3/3) ... [2019-09-09 19:08:23,588 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2019-09-09 19:08:23,604 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:08:23,614 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:08:23,632 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:08:23,664 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:08:23,664 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:08:23,664 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:08:23,664 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:08:23,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:08:23,665 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:08:23,665 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:08:23,665 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:08:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:08:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-09 19:08:23,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:08:23,708 INFO L399 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] [2019-09-09 19:08:23,710 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:08:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:23,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1306431624, now seen corresponding path program 1 times [2019-09-09 19:08:23,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:08:23,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:23,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:08:23,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:23,772 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:08:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:08:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:08:24,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:08:24,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:08:24,062 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:08:24,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:08:24,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:08:24,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:08:24,086 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:08:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:08:29,676 INFO L93 Difference]: Finished difference Result 1123 states and 1832 transitions. [2019-09-09 19:08:29,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:08:29,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-09-09 19:08:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:08:29,708 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 19:08:29,708 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 19:08:29,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:08:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 19:08:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1013. [2019-09-09 19:08:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2019-09-09 19:08:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1638 transitions. [2019-09-09 19:08:29,824 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1638 transitions. Word has length 24 [2019-09-09 19:08:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:08:29,825 INFO L475 AbstractCegarLoop]: Abstraction has 1013 states and 1638 transitions. [2019-09-09 19:08:29,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:08:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1638 transitions. [2019-09-09 19:08:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-09 19:08:29,830 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:08:29,830 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:08:29,831 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:08:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1375804861, now seen corresponding path program 1 times [2019-09-09 19:08:29,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:08:29,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:29,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:08:29,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:29,833 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:08:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:08:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:08:30,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:08:30,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:08:30,023 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:08:30,025 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:08:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:08:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:08:30,026 INFO L87 Difference]: Start difference. First operand 1013 states and 1638 transitions. Second operand 5 states. [2019-09-09 19:08:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:08:34,423 INFO L93 Difference]: Finished difference Result 1996 states and 2816 transitions. [2019-09-09 19:08:34,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:08:34,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2019-09-09 19:08:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:08:34,444 INFO L225 Difference]: With dead ends: 1996 [2019-09-09 19:08:34,444 INFO L226 Difference]: Without dead ends: 1996 [2019-09-09 19:08:34,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 19:08:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2019-09-09 19:08:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1958. [2019-09-09 19:08:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1958 states. [2019-09-09 19:08:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2746 transitions. [2019-09-09 19:08:34,546 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2746 transitions. Word has length 96 [2019-09-09 19:08:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:08:34,547 INFO L475 AbstractCegarLoop]: Abstraction has 1958 states and 2746 transitions. [2019-09-09 19:08:34,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:08:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2746 transitions. [2019-09-09 19:08:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-09 19:08:34,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:08:34,563 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:08:34,564 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:08:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -396281549, now seen corresponding path program 1 times [2019-09-09 19:08:34,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:08:34,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:34,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:08:34,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:34,569 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:08:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:08:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:08:34,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:08:34,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:08:34,773 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:08:34,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:08:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:08:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:08:34,775 INFO L87 Difference]: Start difference. First operand 1958 states and 2746 transitions. Second operand 4 states. [2019-09-09 19:08:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:08:41,064 INFO L93 Difference]: Finished difference Result 5668 states and 7451 transitions. [2019-09-09 19:08:41,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:08:41,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 104 [2019-09-09 19:08:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:08:41,097 INFO L225 Difference]: With dead ends: 5668 [2019-09-09 19:08:41,098 INFO L226 Difference]: Without dead ends: 5668 [2019-09-09 19:08:41,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:08:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2019-09-09 19:08:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5666. [2019-09-09 19:08:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5666 states. [2019-09-09 19:08:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 7447 transitions. [2019-09-09 19:08:41,235 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 7447 transitions. Word has length 104 [2019-09-09 19:08:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:08:41,236 INFO L475 AbstractCegarLoop]: Abstraction has 5666 states and 7447 transitions. [2019-09-09 19:08:41,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:08:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 7447 transitions. [2019-09-09 19:08:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-09 19:08:41,240 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:08:41,240 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:08:41,240 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:08:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash 182614777, now seen corresponding path program 1 times [2019-09-09 19:08:41,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:08:41,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:41,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:08:41,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:08:41,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:08:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:08:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 19:08:41,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:08:41,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:08:41,442 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 193 with the following transitions: [2019-09-09 19:08:41,445 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [173], [175], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [714], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:08:41,509 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:08:41,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:08:44,170 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:08:44,172 INFO L272 AbstractInterpreter]: Visited 104 different actions 104 times. Never merged. Never widened. Performed 247 root evaluator evaluations with a maximum evaluation depth of 13. Performed 247 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:08:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:08:44,177 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:08:45,986 INFO L227 lantSequenceWeakener]: Weakened 173 states. On average, predicates are now at 77.6% of their original sizes. [2019-09-09 19:08:45,987 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:08:46,081 INFO L420 sIntCurrentIteration]: We unified 191 AI predicates to 191 [2019-09-09 19:08:46,081 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:08:46,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:08:46,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:08:46,083 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:08:46,084 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:08:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:08:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:08:46,084 INFO L87 Difference]: Start difference. First operand 5666 states and 7447 transitions. Second operand 11 states. [2019-09-09 19:08:57,570 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.