/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:38:29,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:38:29,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:38:29,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:38:29,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:38:29,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:38:29,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:38:29,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:38:29,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:38:29,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:38:29,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:38:29,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:38:29,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:38:29,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:38:29,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:38:29,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:38:29,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:38:29,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:38:29,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:38:29,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:38:29,908 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 22:38:29,923 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:38:29,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:38:29,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:38:29,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:38:29,925 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:38:29,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:38:29,925 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:38:29,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:38:29,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:38:29,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:38:29,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:38:29,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:38:29,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:38:29,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:38:29,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:38:29,927 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:38:29,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:38:29,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:38:29,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:38:29,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:38:29,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:38:29,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:29,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:38:29,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:38:29,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:38:29,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:38:29,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:38:29,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:38:29,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:38:30,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:38:30,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:38:30,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:38:30,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:38:30,233 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:38:30,234 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-11-06 22:38:30,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ad9bc51/42836db6e2844ffc8980ec223aa0a292/FLAG8d4e17cf5 [2019-11-06 22:38:31,020 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:38:31,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-11-06 22:38:31,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ad9bc51/42836db6e2844ffc8980ec223aa0a292/FLAG8d4e17cf5 [2019-11-06 22:38:31,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ad9bc51/42836db6e2844ffc8980ec223aa0a292 [2019-11-06 22:38:31,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:38:31,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:38:31,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:31,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:38:31,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:38:31,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:31" (1/1) ... [2019-11-06 22:38:31,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4599ef75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:31, skipping insertion in model container [2019-11-06 22:38:31,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:31" (1/1) ... [2019-11-06 22:38:31,209 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:38:31,295 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:38:32,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:32,105 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:38:32,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:32,400 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:38:32,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32 WrapperNode [2019-11-06 22:38:32,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:32,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:38:32,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:38:32,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:38:32,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (1/1) ... [2019-11-06 22:38:32,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:38:32,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:38:32,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:38:32,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:38:32,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (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 22:38:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:38:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:38:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:38:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:38:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:38:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:38:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:38:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:38:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:38:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:38:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:38:34,658 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:38:34,658 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:38:34,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:34 BoogieIcfgContainer [2019-11-06 22:38:34,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:38:34,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:38:34,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:38:34,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:38:34,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:31" (1/3) ... [2019-11-06 22:38:34,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20761515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:34, skipping insertion in model container [2019-11-06 22:38:34,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:32" (2/3) ... [2019-11-06 22:38:34,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20761515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:34, skipping insertion in model container [2019-11-06 22:38:34,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:34" (3/3) ... [2019-11-06 22:38:34,669 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2019-11-06 22:38:34,679 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:38:34,688 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:38:34,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:38:34,730 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:38:34,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:38:34,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:38:34,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:38:34,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:38:34,731 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:38:34,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:38:34,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:38:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:38:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 22:38:34,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:34,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:34,779 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2093619232, now seen corresponding path program 1 times [2019-11-06 22:38:34,796 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:34,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717387406] [2019-11-06 22:38:34,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:35,674 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 22:38:35,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717387406] [2019-11-06 22:38:35,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:35,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:35,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165416909] [2019-11-06 22:38:35,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:35,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:35,709 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:38:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:37,072 INFO L93 Difference]: Finished difference Result 845 states and 1488 transitions. [2019-11-06 22:38:37,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:37,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-11-06 22:38:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:37,095 INFO L225 Difference]: With dead ends: 845 [2019-11-06 22:38:37,095 INFO L226 Difference]: Without dead ends: 472 [2019-11-06 22:38:37,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-11-06 22:38:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2019-11-06 22:38:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2019-11-06 22:38:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 716 transitions. [2019-11-06 22:38:37,209 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 716 transitions. Word has length 207 [2019-11-06 22:38:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:37,211 INFO L462 AbstractCegarLoop]: Abstraction has 470 states and 716 transitions. [2019-11-06 22:38:37,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 716 transitions. [2019-11-06 22:38:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:38:37,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:37,219 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:37,219 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1254940916, now seen corresponding path program 1 times [2019-11-06 22:38:37,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:37,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401293459] [2019-11-06 22:38:37,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:37,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401293459] [2019-11-06 22:38:37,664 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:37,664 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:38:37,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454450950] [2019-11-06 22:38:37,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:38:37,668 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:38:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:37,669 INFO L87 Difference]: Start difference. First operand 470 states and 716 transitions. Second operand 3 states. [2019-11-06 22:38:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:38,862 INFO L93 Difference]: Finished difference Result 1368 states and 2117 transitions. [2019-11-06 22:38:38,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:38:38,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-11-06 22:38:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:38,870 INFO L225 Difference]: With dead ends: 1368 [2019-11-06 22:38:38,870 INFO L226 Difference]: Without dead ends: 904 [2019-11-06 22:38:38,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:38:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-11-06 22:38:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 888. [2019-11-06 22:38:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-11-06 22:38:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1330 transitions. [2019-11-06 22:38:38,924 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1330 transitions. Word has length 219 [2019-11-06 22:38:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:38,926 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1330 transitions. [2019-11-06 22:38:38,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:38:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1330 transitions. [2019-11-06 22:38:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-11-06 22:38:38,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:38,933 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:38,933 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1726908452, now seen corresponding path program 1 times [2019-11-06 22:38:38,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:38,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609778846] [2019-11-06 22:38:38,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:39,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609778846] [2019-11-06 22:38:39,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909673595] [2019-11-06 22:38:39,071 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 22:38:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:39,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:38:39,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:39,550 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:39,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1922575268] [2019-11-06 22:38:39,777 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 230 [2019-11-06 22:38:39,855 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:39,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)