/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/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:53:53,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:53:53,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:53:53,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:53:53,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:53:53,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:53:53,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:53:53,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:53:53,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:53:53,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:53:53,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:53:53,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:53:53,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:53:53,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:53:53,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:53:53,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:53:53,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:53:53,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:53:53,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:53:53,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:53:53,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:53:53,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:53:53,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:53:53,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:53:53,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:53:53,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:53:53,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:53:53,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:53:53,709 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 22:53:53,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:53:53,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:53:53,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:53:53,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:53:53,738 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:53:53,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:53:53,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:53:53,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:53:53,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:53:53,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:53:53,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:53:53,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:53:53,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:53:53,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:53:53,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:53:53,742 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:53:53,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:53:53,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:53:53,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:53:53,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:53:53,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:53:53,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:53:53,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:53:53,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:53:53,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:53:53,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:53:53,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:53:53,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:53:53,745 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 22:53:54,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:53:54,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:53:54,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:53:54,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:53:54,019 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:53:54,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-11-06 22:53:54,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044aff2c3/b354a2de436545afa54d18fab10fdce6/FLAGbc73e4864 [2019-11-06 22:53:54,731 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:53:54,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-11-06 22:53:54,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044aff2c3/b354a2de436545afa54d18fab10fdce6/FLAGbc73e4864 [2019-11-06 22:53:54,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044aff2c3/b354a2de436545afa54d18fab10fdce6 [2019-11-06 22:53:54,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:53:54,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:53:54,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:54,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:53:54,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:53:54,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:54" (1/1) ... [2019-11-06 22:53:54,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b57b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:54, skipping insertion in model container [2019-11-06 22:53:54,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:53:54" (1/1) ... [2019-11-06 22:53:54,932 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:53:55,005 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:53:55,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:55,865 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:53:56,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:53:56,121 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:53:56,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56 WrapperNode [2019-11-06 22:53:56,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:53:56,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:53:56,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:53:56,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:53:56,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (1/1) ... [2019-11-06 22:53:56,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:53:56,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:53:56,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:53:56,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:53:56,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (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 22:53:56,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:53:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:53:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:53:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:53:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:53:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:53:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:53:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:53:56,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:53:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:53:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:53:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:53:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:53:58,917 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:53:58,917 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:53:58,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:58 BoogieIcfgContainer [2019-11-06 22:53:58,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:53:58,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:53:58,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:53:58,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:53:58,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:53:54" (1/3) ... [2019-11-06 22:53:58,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0849e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:58, skipping insertion in model container [2019-11-06 22:53:58,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:56" (2/3) ... [2019-11-06 22:53:58,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0849e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:58, skipping insertion in model container [2019-11-06 22:53:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:58" (3/3) ... [2019-11-06 22:53:58,928 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-11-06 22:53:58,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:53:58,954 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:53:58,972 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:53:59,021 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:53:59,021 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:53:59,022 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:53:59,022 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:53:59,022 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:53:59,022 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:53:59,022 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:53:59,023 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:53:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:53:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:53:59,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:59,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:53:59,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-11-06 22:53:59,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:59,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031763583] [2019-11-06 22:53:59,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:59,598 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 22:53:59,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031763583] [2019-11-06 22:53:59,600 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:59,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:53:59,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048791912] [2019-11-06 22:53:59,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:53:59,614 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:53:59,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:53:59,642 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:06,280 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:06,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:06,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-11-06 22:54:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:06,313 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:06,313 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:06,329 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 22:54:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-11-06 22:54:06,465 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 60 [2019-11-06 22:54:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:06,466 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-11-06 22:54:06,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-11-06 22:54:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:54:06,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:06,474 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:06,474 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-11-06 22:54:06,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:06,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543175540] [2019-11-06 22:54:06,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:06,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543175540] [2019-11-06 22:54:06,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:06,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:06,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233217987] [2019-11-06 22:54:06,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:06,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:06,715 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-11-06 22:54:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:12,023 INFO L93 Difference]: Finished difference Result 2806 states and 4911 transitions. [2019-11-06 22:54:12,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:54:12,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-11-06 22:54:12,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:12,050 INFO L225 Difference]: With dead ends: 2806 [2019-11-06 22:54:12,050 INFO L226 Difference]: Without dead ends: 2130 [2019-11-06 22:54:12,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:54:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2019-11-06 22:54:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2087. [2019-11-06 22:54:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-11-06 22:54:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-11-06 22:54:12,175 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 135 [2019-11-06 22:54:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:12,179 INFO L462 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-11-06 22:54:12,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-11-06 22:54:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:54:12,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:12,192 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:12,193 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-11-06 22:54:12,193 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:12,194 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187875407] [2019-11-06 22:54:12,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:12,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187875407] [2019-11-06 22:54:12,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:12,423 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:12,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371775246] [2019-11-06 22:54:12,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:12,424 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:12,425 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-11-06 22:54:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:15,297 INFO L93 Difference]: Finished difference Result 5623 states and 9425 transitions. [2019-11-06 22:54:15,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:15,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-11-06 22:54:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:15,328 INFO L225 Difference]: With dead ends: 5623 [2019-11-06 22:54:15,328 INFO L226 Difference]: Without dead ends: 3542 [2019-11-06 22:54:15,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-11-06 22:54:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-11-06 22:54:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-11-06 22:54:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5695 transitions. [2019-11-06 22:54:15,493 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5695 transitions. Word has length 139 [2019-11-06 22:54:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:15,494 INFO L462 AbstractCegarLoop]: Abstraction has 3503 states and 5695 transitions. [2019-11-06 22:54:15,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5695 transitions. [2019-11-06 22:54:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 22:54:15,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:15,499 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:15,499 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1876426643, now seen corresponding path program 1 times [2019-11-06 22:54:15,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:15,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037874319] [2019-11-06 22:54:15,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:15,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037874319] [2019-11-06 22:54:15,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:15,746 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:15,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669138989] [2019-11-06 22:54:15,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:15,749 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:15,750 INFO L87 Difference]: Start difference. First operand 3503 states and 5695 transitions. Second operand 6 states. [2019-11-06 22:54:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:18,315 INFO L93 Difference]: Finished difference Result 8509 states and 14335 transitions. [2019-11-06 22:54:18,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:18,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-11-06 22:54:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:18,344 INFO L225 Difference]: With dead ends: 8509 [2019-11-06 22:54:18,345 INFO L226 Difference]: Without dead ends: 5012 [2019-11-06 22:54:18,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-11-06 22:54:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4965. [2019-11-06 22:54:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4965 states. [2019-11-06 22:54:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 7684 transitions. [2019-11-06 22:54:18,518 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 7684 transitions. Word has length 175 [2019-11-06 22:54:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:18,520 INFO L462 AbstractCegarLoop]: Abstraction has 4965 states and 7684 transitions. [2019-11-06 22:54:18,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 7684 transitions. [2019-11-06 22:54:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 22:54:18,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:18,526 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:18,526 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1318797007, now seen corresponding path program 1 times [2019-11-06 22:54:18,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:18,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754744681] [2019-11-06 22:54:18,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:18,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754744681] [2019-11-06 22:54:18,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369022651] [2019-11-06 22:54:18,753 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 22:54:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:18,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:18,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:54:19,065 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:19,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:19,287 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:54:19,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370215096] [2019-11-06 22:54:19,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:19,289 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:54:19,292 INFO L87 Difference]: Start difference. First operand 4965 states and 7684 transitions. Second operand 5 states. [2019-11-06 22:54:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:21,887 INFO L93 Difference]: Finished difference Result 11032 states and 17418 transitions. [2019-11-06 22:54:21,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:54:21,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-11-06 22:54:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:21,920 INFO L225 Difference]: With dead ends: 11032 [2019-11-06 22:54:21,921 INFO L226 Difference]: Without dead ends: 6073 [2019-11-06 22:54:21,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 442 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:54:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6073 states. [2019-11-06 22:54:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6073 to 5682. [2019-11-06 22:54:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5682 states. [2019-11-06 22:54:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5682 states to 5682 states and 8063 transitions. [2019-11-06 22:54:22,126 INFO L78 Accepts]: Start accepts. Automaton has 5682 states and 8063 transitions. Word has length 224 [2019-11-06 22:54:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:22,127 INFO L462 AbstractCegarLoop]: Abstraction has 5682 states and 8063 transitions. [2019-11-06 22:54:22,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5682 states and 8063 transitions. [2019-11-06 22:54:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 22:54:22,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:22,134 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:22,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:22,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:22,338 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-11-06 22:54:22,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:22,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908137138] [2019-11-06 22:54:22,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 107 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-06 22:54:22,531 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908137138] [2019-11-06 22:54:22,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388249211] [2019-11-06 22:54:22,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:22,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:22,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:22,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:22,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [653802917] [2019-11-06 22:54:22,871 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 235 [2019-11-06 22:54:22,933 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:22,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:54:27,999 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-06 22:54:30,020 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:54:30,022 INFO L272 AbstractInterpreter]: Visited 99 different actions 193 times. Merged at 4 different actions 5 times. Never widened. Performed 447 root evaluator evaluations with a maximum evaluation depth of 14. Performed 447 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-11-06 22:54:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:30,027 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates