/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/Problem12_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:38,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:38,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:38,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:38,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:38,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:38,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:38,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:38,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:38,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:38,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:38,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:38,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:38,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:38,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:38,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:38,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:38,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:38,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:38,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:38,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:38,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:38,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:38,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:38,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:49:38,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:38,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:38,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:38,732 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 22:49:38,760 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:38,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:38,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:38,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:38,762 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:38,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:38,762 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:38,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:38,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:38,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:38,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:38,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:38,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:38,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:38,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:38,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:38,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:38,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:38,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:38,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:38,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:38,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:38,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:38,766 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 22:49:39,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:39,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:39,068 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:39,070 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:39,070 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:39,071 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-06 22:49:39,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a818bbf1/6ae6becd7e6a4243bcb856894c86fef4/FLAGd5c6f137e [2019-11-06 22:49:39,908 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:39,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-11-06 22:49:39,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a818bbf1/6ae6becd7e6a4243bcb856894c86fef4/FLAGd5c6f137e [2019-11-06 22:49:40,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a818bbf1/6ae6becd7e6a4243bcb856894c86fef4 [2019-11-06 22:49:40,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:40,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:40,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:40,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:40,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:40,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:40" (1/1) ... [2019-11-06 22:49:40,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19757915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:40, skipping insertion in model container [2019-11-06 22:49:40,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:40" (1/1) ... [2019-11-06 22:49:40,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:40,218 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:41,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:41,601 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:42,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:42,191 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:42,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42 WrapperNode [2019-11-06 22:49:42,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:42,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:42,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:42,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:42,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (1/1) ... [2019-11-06 22:49:42,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:42,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:42,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:42,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:42,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (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 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:47,363 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:47,363 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:47,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:47 BoogieIcfgContainer [2019-11-06 22:49:47,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:47,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:47,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:47,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:47,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:40" (1/3) ... [2019-11-06 22:49:47,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7c6f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:47, skipping insertion in model container [2019-11-06 22:49:47,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:42" (2/3) ... [2019-11-06 22:49:47,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7c6f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:47, skipping insertion in model container [2019-11-06 22:49:47,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:47" (3/3) ... [2019-11-06 22:49:47,373 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2019-11-06 22:49:47,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:47,392 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:47,405 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:47,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:47,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:47,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:47,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:47,438 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:47,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:47,439 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:47,439 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:49:47,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:47,483 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] [2019-11-06 22:49:47,484 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:47,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1317683707, now seen corresponding path program 1 times [2019-11-06 22:49:47,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:47,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246939721] [2019-11-06 22:49:47,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:47,891 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 22:49:47,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246939721] [2019-11-06 22:49:47,894 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:47,894 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:49:47,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560817356] [2019-11-06 22:49:47,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:47,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:47,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:47,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:47,922 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-11-06 22:49:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:52,880 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-11-06 22:49:52,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:52,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2019-11-06 22:49:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:52,925 INFO L225 Difference]: With dead ends: 2443 [2019-11-06 22:49:52,926 INFO L226 Difference]: Without dead ends: 1542 [2019-11-06 22:49:52,940 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 22:49:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-11-06 22:49:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-11-06 22:49:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-11-06 22:49:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2852 transitions. [2019-11-06 22:49:53,108 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2852 transitions. Word has length 50 [2019-11-06 22:49:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:53,110 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2852 transitions. [2019-11-06 22:49:53,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2852 transitions. [2019-11-06 22:49:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 22:49:53,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:53,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:53,126 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2146866983, now seen corresponding path program 1 times [2019-11-06 22:49:53,127 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:53,127 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382446176] [2019-11-06 22:49:53,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:53,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382446176] [2019-11-06 22:49:53,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:53,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:53,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812093333] [2019-11-06 22:49:53,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:53,361 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:53,362 INFO L87 Difference]: Start difference. First operand 1542 states and 2852 transitions. Second operand 5 states. [2019-11-06 22:50:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:00,077 INFO L93 Difference]: Finished difference Result 4685 states and 8680 transitions. [2019-11-06 22:50:00,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:50:00,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-11-06 22:50:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:00,102 INFO L225 Difference]: With dead ends: 4685 [2019-11-06 22:50:00,103 INFO L226 Difference]: Without dead ends: 3149 [2019-11-06 22:50:00,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-11-06 22:50:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3117. [2019-11-06 22:50:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-11-06 22:50:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5119 transitions. [2019-11-06 22:50:00,233 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5119 transitions. Word has length 119 [2019-11-06 22:50:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:00,236 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 5119 transitions. [2019-11-06 22:50:00,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:50:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5119 transitions. [2019-11-06 22:50:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:50:00,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:00,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:00,244 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1546476435, now seen corresponding path program 1 times [2019-11-06 22:50:00,246 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:00,246 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848177072] [2019-11-06 22:50:00,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:00,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848177072] [2019-11-06 22:50:00,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079366899] [2019-11-06 22:50:00,494 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 22:50:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:00,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:50:00,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:50:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:00,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:50:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:00,772 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:50:00,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:50:00,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444003780] [2019-11-06 22:50:00,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:50:00,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:50:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:50:00,778 INFO L87 Difference]: Start difference. First operand 3117 states and 5119 transitions. Second operand 4 states. [2019-11-06 22:50:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:08,880 INFO L93 Difference]: Finished difference Result 12431 states and 20959 transitions. [2019-11-06 22:50:08,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:08,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-11-06 22:50:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:08,941 INFO L225 Difference]: With dead ends: 12431 [2019-11-06 22:50:08,942 INFO L226 Difference]: Without dead ends: 9320 [2019-11-06 22:50:08,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:50:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9320 states. [2019-11-06 22:50:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9320 to 9320. [2019-11-06 22:50:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2019-11-06 22:50:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 13728 transitions. [2019-11-06 22:50:09,284 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 13728 transitions. Word has length 125 [2019-11-06 22:50:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:09,285 INFO L462 AbstractCegarLoop]: Abstraction has 9320 states and 13728 transitions. [2019-11-06 22:50:09,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 13728 transitions. [2019-11-06 22:50:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:50:09,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:09,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:09,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:50:09,491 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash 856168640, now seen corresponding path program 1 times [2019-11-06 22:50:09,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:09,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157696403] [2019-11-06 22:50:09,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:09,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157696403] [2019-11-06 22:50:09,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:09,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:50:09,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153443296] [2019-11-06 22:50:09,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:50:09,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:50:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:09,693 INFO L87 Difference]: Start difference. First operand 9320 states and 13728 transitions. Second operand 6 states.