/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/Problem02_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:36:47,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:36:47,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:36:47,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:36:47,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:36:47,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:36:47,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:36:47,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:36:47,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:36:47,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:36:47,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:36:47,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:36:47,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:36:47,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:36:47,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:36:47,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:36:47,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:36:47,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:36:47,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:36:47,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:36:47,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:36:47,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:36:47,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:36:47,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:36:47,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:36:47,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:36:47,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:36:47,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:36:47,596 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 22:36:47,609 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:36:47,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:36:47,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:36:47,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:36:47,610 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:36:47,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:36:47,611 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:36:47,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:36:47,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:36:47,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:36:47,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:36:47,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:36:47,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:36:47,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:36:47,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:36:47,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:36:47,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:36:47,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:36:47,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:36:47,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:36:47,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:36:47,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:36:47,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:36:47,618 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 22:36:47,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:36:47,930 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:36:47,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:36:47,934 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:36:47,935 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:36:47,935 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-11-06 22:36:48,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9450bfd9b/469e10317bfa47c9a801a2c245f4fbbb/FLAG3fa6aecc1 [2019-11-06 22:36:48,588 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:36:48,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2019-11-06 22:36:48,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9450bfd9b/469e10317bfa47c9a801a2c245f4fbbb/FLAG3fa6aecc1 [2019-11-06 22:36:48,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9450bfd9b/469e10317bfa47c9a801a2c245f4fbbb [2019-11-06 22:36:48,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:36:48,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:36:48,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:48,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:36:48,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:36:48,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:48" (1/1) ... [2019-11-06 22:36:48,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8ae619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:48, skipping insertion in model container [2019-11-06 22:36:48,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:48" (1/1) ... [2019-11-06 22:36:48,895 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:36:48,955 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:36:49,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:49,432 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:36:49,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:36:49,565 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:36:49,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49 WrapperNode [2019-11-06 22:36:49,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:36:49,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:36:49,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:36:49,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:36:49,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (1/1) ... [2019-11-06 22:36:49,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:36:49,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:36:49,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:36:49,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:36:49,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (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 22:36:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:36:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:36:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:36:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:36:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:36:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:36:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:36:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:36:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:36:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:36:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:36:50,943 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:36:50,943 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:36:50,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:50 BoogieIcfgContainer [2019-11-06 22:36:50,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:36:50,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:36:50,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:36:50,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:36:50,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:48" (1/3) ... [2019-11-06 22:36:50,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7948a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:50, skipping insertion in model container [2019-11-06 22:36:50,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:49" (2/3) ... [2019-11-06 22:36:50,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7948a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:50, skipping insertion in model container [2019-11-06 22:36:50,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:50" (3/3) ... [2019-11-06 22:36:50,957 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2019-11-06 22:36:50,967 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:36:50,977 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:36:50,989 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:36:51,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:36:51,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:36:51,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:36:51,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:36:51,025 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:36:51,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:36:51,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:36:51,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:36:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:36:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:36:51,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:51,070 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] [2019-11-06 22:36:51,072 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1422395146, now seen corresponding path program 1 times [2019-11-06 22:36:51,088 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:51,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265919471] [2019-11-06 22:36:51,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:51,617 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 22:36:51,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265919471] [2019-11-06 22:36:51,619 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:51,620 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:36:51,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482658732] [2019-11-06 22:36:51,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:51,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:36:51,649 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:36:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:52,592 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-11-06 22:36:52,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:36:52,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-11-06 22:36:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:52,623 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:36:52,623 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:52,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:36:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-11-06 22:36:52,729 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 144 [2019-11-06 22:36:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:52,730 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-11-06 22:36:52,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:36:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-11-06 22:36:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:36:52,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:52,737 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:52,738 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:52,738 INFO L82 PathProgramCache]: Analyzing trace with hash 339587089, now seen corresponding path program 1 times [2019-11-06 22:36:52,738 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:52,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566163648] [2019-11-06 22:36:52,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:53,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566163648] [2019-11-06 22:36:53,124 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:53,124 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:53,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887900875] [2019-11-06 22:36:53,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:53,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:53,128 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 5 states. [2019-11-06 22:36:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:53,819 INFO L93 Difference]: Finished difference Result 721 states and 1089 transitions. [2019-11-06 22:36:53,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:53,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2019-11-06 22:36:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:53,825 INFO L225 Difference]: With dead ends: 721 [2019-11-06 22:36:53,825 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:53,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2019-11-06 22:36:53,848 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 152 [2019-11-06 22:36:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:53,848 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2019-11-06 22:36:53,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2019-11-06 22:36:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:36:53,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:53,852 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:53,852 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash -84143163, now seen corresponding path program 1 times [2019-11-06 22:36:53,853 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:53,853 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885953547] [2019-11-06 22:36:53,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:54,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885953547] [2019-11-06 22:36:54,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:54,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:54,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244466162] [2019-11-06 22:36:54,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:54,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:54,125 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand 5 states. [2019-11-06 22:36:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:54,909 INFO L93 Difference]: Finished difference Result 717 states and 1075 transitions. [2019-11-06 22:36:54,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:54,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-11-06 22:36:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:54,912 INFO L225 Difference]: With dead ends: 717 [2019-11-06 22:36:54,913 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:36:54,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:36:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-11-06 22:36:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-06 22:36:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 455 transitions. [2019-11-06 22:36:54,931 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 455 transitions. Word has length 158 [2019-11-06 22:36:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:54,931 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 455 transitions. [2019-11-06 22:36:54,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 455 transitions. [2019-11-06 22:36:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:36:54,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:54,935 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:36:54,935 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash 284152846, now seen corresponding path program 1 times [2019-11-06 22:36:54,936 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:54,936 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496620181] [2019-11-06 22:36:54,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:55,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496620181] [2019-11-06 22:36:55,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:55,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:55,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036150463] [2019-11-06 22:36:55,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:55,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:55,043 INFO L87 Difference]: Start difference. First operand 320 states and 455 transitions. Second operand 6 states. [2019-11-06 22:36:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:55,904 INFO L93 Difference]: Finished difference Result 951 states and 1383 transitions. [2019-11-06 22:36:55,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:55,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-11-06 22:36:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:55,910 INFO L225 Difference]: With dead ends: 951 [2019-11-06 22:36:55,910 INFO L226 Difference]: Without dead ends: 637 [2019-11-06 22:36:55,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 22:36:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-11-06 22:36:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 626. [2019-11-06 22:36:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:36:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 870 transitions. [2019-11-06 22:36:55,943 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 870 transitions. Word has length 166 [2019-11-06 22:36:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:55,944 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 870 transitions. [2019-11-06 22:36:55,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 870 transitions. [2019-11-06 22:36:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 22:36:55,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:55,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:55,948 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2061838006, now seen corresponding path program 1 times [2019-11-06 22:36:55,949 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:55,949 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022214455] [2019-11-06 22:36:55,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:56,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022214455] [2019-11-06 22:36:56,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:56,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:56,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027205715] [2019-11-06 22:36:56,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:56,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:56,156 INFO L87 Difference]: Start difference. First operand 626 states and 870 transitions. Second operand 5 states. [2019-11-06 22:36:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:56,912 INFO L93 Difference]: Finished difference Result 1330 states and 1901 transitions. [2019-11-06 22:36:56,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:56,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2019-11-06 22:36:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:56,917 INFO L225 Difference]: With dead ends: 1330 [2019-11-06 22:36:56,917 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 22:36:56,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 22:36:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-06 22:36:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:36:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 858 transitions. [2019-11-06 22:36:56,943 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 858 transitions. Word has length 168 [2019-11-06 22:36:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:56,944 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 858 transitions. [2019-11-06 22:36:56,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 858 transitions. [2019-11-06 22:36:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 22:36:56,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:56,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:56,950 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:56,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2138250886, now seen corresponding path program 1 times [2019-11-06 22:36:56,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:56,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364281265] [2019-11-06 22:36:56,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:57,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364281265] [2019-11-06 22:36:57,195 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:57,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:36:57,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631427680] [2019-11-06 22:36:57,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:36:57,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:57,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:36:57,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:57,198 INFO L87 Difference]: Start difference. First operand 626 states and 858 transitions. Second operand 5 states. [2019-11-06 22:36:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:57,873 INFO L93 Difference]: Finished difference Result 1332 states and 1876 transitions. [2019-11-06 22:36:57,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:36:57,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-11-06 22:36:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:57,877 INFO L225 Difference]: With dead ends: 1332 [2019-11-06 22:36:57,877 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 22:36:57,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:36:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 22:36:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-11-06 22:36:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 22:36:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 842 transitions. [2019-11-06 22:36:57,897 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 842 transitions. Word has length 170 [2019-11-06 22:36:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:57,898 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 842 transitions. [2019-11-06 22:36:57,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:36:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 842 transitions. [2019-11-06 22:36:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 22:36:57,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:57,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:57,901 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash 23816446, now seen corresponding path program 1 times [2019-11-06 22:36:57,902 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:57,902 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724639325] [2019-11-06 22:36:57,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:57,987 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724639325] [2019-11-06 22:36:57,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:36:57,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:36:57,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377009999] [2019-11-06 22:36:57,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:36:57,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:36:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:36:57,989 INFO L87 Difference]: Start difference. First operand 626 states and 842 transitions. Second operand 6 states. [2019-11-06 22:36:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:36:58,965 INFO L93 Difference]: Finished difference Result 1858 states and 2598 transitions. [2019-11-06 22:36:58,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:36:58,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-11-06 22:36:58,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:36:58,978 INFO L225 Difference]: With dead ends: 1858 [2019-11-06 22:36:58,979 INFO L226 Difference]: Without dead ends: 1238 [2019-11-06 22:36:58,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 22:36:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-11-06 22:36:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2019-11-06 22:36:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-11-06 22:36:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1634 transitions. [2019-11-06 22:36:59,047 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1634 transitions. Word has length 174 [2019-11-06 22:36:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:36:59,048 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1634 transitions. [2019-11-06 22:36:59,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:36:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1634 transitions. [2019-11-06 22:36:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-06 22:36:59,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:36:59,056 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, 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] [2019-11-06 22:36:59,056 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:36:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:36:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 141476734, now seen corresponding path program 1 times [2019-11-06 22:36:59,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:36:59,057 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463235249] [2019-11-06 22:36:59,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:36:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:36:59,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463235249] [2019-11-06 22:36:59,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414537187] [2019-11-06 22:36:59,223 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 22:36:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:36:59,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:36:59,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:36:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 22:36:59,596 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:36:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 22:36:59,747 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:36:59,748 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:36:59,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750261606] [2019-11-06 22:36:59,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:36:59,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:36:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:36:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:36:59,752 INFO L87 Difference]: Start difference. First operand 1218 states and 1634 transitions. Second operand 3 states. [2019-11-06 22:37:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:00,382 INFO L93 Difference]: Finished difference Result 3012 states and 4061 transitions. [2019-11-06 22:37:00,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:00,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-11-06 22:37:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:00,391 INFO L225 Difference]: With dead ends: 3012 [2019-11-06 22:37:00,392 INFO L226 Difference]: Without dead ends: 1060 [2019-11-06 22:37:00,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:37:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2019-11-06 22:37:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2019-11-06 22:37:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1060 states. [2019-11-06 22:37:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1378 transitions. [2019-11-06 22:37:00,434 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1378 transitions. Word has length 208 [2019-11-06 22:37:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:00,436 INFO L462 AbstractCegarLoop]: Abstraction has 1060 states and 1378 transitions. [2019-11-06 22:37:00,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1378 transitions. [2019-11-06 22:37:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-11-06 22:37:00,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:00,442 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:00,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:00,655 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1442717386, now seen corresponding path program 1 times [2019-11-06 22:37:00,657 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:00,657 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685650417] [2019-11-06 22:37:00,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 104 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:37:00,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685650417] [2019-11-06 22:37:00,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124031499] [2019-11-06 22:37:00,885 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 22:37:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:01,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:01,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:37:01,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:37:01,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2084082419] [2019-11-06 22:37:01,408 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 245 [2019-11-06 22:37:01,485 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:37:01,485 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)