/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:41:45,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:41:45,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:41:45,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:41:45,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:41:45,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:41:45,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:41:45,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:41:45,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:41:45,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:41:45,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:41:45,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:41:45,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:41:45,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:41:45,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:41:45,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:41:45,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:41:45,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:41:45,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:41:45,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:41:45,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:41:45,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:41:45,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:41:45,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:41:45,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:41:45,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:41:45,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:41:45,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:41:45,971 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 [2019-11-07 04:41:45,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:41:45,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:41:45,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:41:45,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:41:45,995 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:41:45,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:41:45,996 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:41:45,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:41:45,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:41:45,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:41:45,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:41:45,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:41:45,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:41:45,998 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:41:45,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:41:45,999 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:41:45,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:41:45,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:41:45,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:41:46,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:41:46,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:41:46,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:41:46,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:41:46,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:41:46,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:41:46,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:41:46,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:41:46,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:41:46,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:41:46,314 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:41:46,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:41:46,340 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:41:46,342 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:41:46,342 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:41:46,343 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-07 04:41:46,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575efd036/1b1976f489a14a8e89d20db0c32e72e2/FLAG831a8741c [2019-11-07 04:41:46,951 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:41:46,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-07 04:41:46,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575efd036/1b1976f489a14a8e89d20db0c32e72e2/FLAG831a8741c [2019-11-07 04:41:47,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/575efd036/1b1976f489a14a8e89d20db0c32e72e2 [2019-11-07 04:41:47,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:41:47,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:41:47,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:41:47,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:41:47,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:41:47,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:41:47" (1/1) ... [2019-11-07 04:41:47,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ab2ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:47, skipping insertion in model container [2019-11-07 04:41:47,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:41:47" (1/1) ... [2019-11-07 04:41:47,405 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:41:47,513 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:41:47,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:41:47,901 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:41:48,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:41:48,079 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:41:48,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48 WrapperNode [2019-11-07 04:41:48,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:41:48,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:41:48,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:41:48,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:41:48,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (1/1) ... [2019-11-07 04:41:48,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:41:48,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:41:48,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:41:48,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:41:48,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (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 [2019-11-07 04:41:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:41:48,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:41:48,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:41:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:41:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-07 04:41:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-07 04:41:48,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-07 04:41:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-07 04:41:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:41:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-07 04:41:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-07 04:41:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-07 04:41:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-07 04:41:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-07 04:41:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-07 04:41:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-07 04:41:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:41:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:41:48,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:41:49,050 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:41:49,050 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 04:41:49,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:41:49 BoogieIcfgContainer [2019-11-07 04:41:49,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:41:49,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:41:49,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:41:49,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:41:49,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:41:47" (1/3) ... [2019-11-07 04:41:49,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592110c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:41:49, skipping insertion in model container [2019-11-07 04:41:49,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:41:48" (2/3) ... [2019-11-07 04:41:49,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592110c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:41:49, skipping insertion in model container [2019-11-07 04:41:49,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:41:49" (3/3) ... [2019-11-07 04:41:49,061 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-07 04:41:49,072 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:41:49,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:41:49,093 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:41:49,118 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:41:49,118 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:41:49,119 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:41:49,119 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:41:49,119 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:41:49,119 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:41:49,119 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:41:49,119 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:41:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2019-11-07 04:41:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 04:41:49,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:49,148 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] [2019-11-07 04:41:49,150 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1163152774, now seen corresponding path program 1 times [2019-11-07 04:41:49,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:49,167 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615818913] [2019-11-07 04:41:49,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:49,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615818913] [2019-11-07 04:41:49,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:49,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:41:49,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043018500] [2019-11-07 04:41:49,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:41:49,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:41:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:49,538 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2019-11-07 04:41:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:49,613 INFO L93 Difference]: Finished difference Result 143 states and 212 transitions. [2019-11-07 04:41:49,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:41:49,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-07 04:41:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:49,630 INFO L225 Difference]: With dead ends: 143 [2019-11-07 04:41:49,631 INFO L226 Difference]: Without dead ends: 93 [2019-11-07 04:41:49,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-07 04:41:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2019-11-07 04:41:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-07 04:41:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2019-11-07 04:41:49,719 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 32 [2019-11-07 04:41:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:49,719 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2019-11-07 04:41:49,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:41:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2019-11-07 04:41:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 04:41:49,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:49,722 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] [2019-11-07 04:41:49,722 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1597776346, now seen corresponding path program 1 times [2019-11-07 04:41:49,723 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:49,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289056105] [2019-11-07 04:41:49,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:49,884 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289056105] [2019-11-07 04:41:49,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:49,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:41:49,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85693270] [2019-11-07 04:41:49,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:41:49,889 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:49,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:41:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:49,890 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 3 states. [2019-11-07 04:41:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:49,962 INFO L93 Difference]: Finished difference Result 205 states and 292 transitions. [2019-11-07 04:41:49,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:41:49,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-07 04:41:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:49,968 INFO L225 Difference]: With dead ends: 205 [2019-11-07 04:41:49,968 INFO L226 Difference]: Without dead ends: 137 [2019-11-07 04:41:49,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-07 04:41:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-11-07 04:41:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-07 04:41:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2019-11-07 04:41:50,017 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 188 transitions. Word has length 34 [2019-11-07 04:41:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:50,018 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 188 transitions. [2019-11-07 04:41:50,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:41:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 188 transitions. [2019-11-07 04:41:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 04:41:50,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:50,020 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] [2019-11-07 04:41:50,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash -420169279, now seen corresponding path program 1 times [2019-11-07 04:41:50,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:50,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322124779] [2019-11-07 04:41:50,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:50,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322124779] [2019-11-07 04:41:50,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:50,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:41:50,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778317926] [2019-11-07 04:41:50,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:41:50,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:41:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:50,158 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. Second operand 3 states. [2019-11-07 04:41:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:50,193 INFO L93 Difference]: Finished difference Result 315 states and 450 transitions. [2019-11-07 04:41:50,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:41:50,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-07 04:41:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:50,202 INFO L225 Difference]: With dead ends: 315 [2019-11-07 04:41:50,203 INFO L226 Difference]: Without dead ends: 203 [2019-11-07 04:41:50,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:41:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-07 04:41:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2019-11-07 04:41:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-11-07 04:41:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 280 transitions. [2019-11-07 04:41:50,260 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 280 transitions. Word has length 37 [2019-11-07 04:41:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:50,263 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 280 transitions. [2019-11-07 04:41:50,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:41:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 280 transitions. [2019-11-07 04:41:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-07 04:41:50,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:50,265 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] [2019-11-07 04:41:50,265 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2107957381, now seen corresponding path program 1 times [2019-11-07 04:41:50,266 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:50,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252364579] [2019-11-07 04:41:50,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:50,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252364579] [2019-11-07 04:41:50,424 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:50,424 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:41:50,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793582960] [2019-11-07 04:41:50,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:41:50,425 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:41:50,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:41:50,426 INFO L87 Difference]: Start difference. First operand 201 states and 280 transitions. Second operand 5 states. [2019-11-07 04:41:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:50,518 INFO L93 Difference]: Finished difference Result 647 states and 915 transitions. [2019-11-07 04:41:50,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:41:50,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-11-07 04:41:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:50,522 INFO L225 Difference]: With dead ends: 647 [2019-11-07 04:41:50,522 INFO L226 Difference]: Without dead ends: 469 [2019-11-07 04:41:50,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:41:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2019-11-07 04:41:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 465. [2019-11-07 04:41:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-11-07 04:41:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 652 transitions. [2019-11-07 04:41:50,572 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 652 transitions. Word has length 40 [2019-11-07 04:41:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:50,572 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 652 transitions. [2019-11-07 04:41:50,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:41:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 652 transitions. [2019-11-07 04:41:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 04:41:50,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:50,574 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] [2019-11-07 04:41:50,575 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:50,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1569876850, now seen corresponding path program 1 times [2019-11-07 04:41:50,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:50,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308125689] [2019-11-07 04:41:50,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:50,675 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308125689] [2019-11-07 04:41:50,675 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:50,675 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 04:41:50,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607712306] [2019-11-07 04:41:50,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:41:50,676 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:50,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:41:50,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:41:50,677 INFO L87 Difference]: Start difference. First operand 465 states and 652 transitions. Second operand 6 states. [2019-11-07 04:41:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:50,825 INFO L93 Difference]: Finished difference Result 907 states and 1281 transitions. [2019-11-07 04:41:50,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:41:50,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-11-07 04:41:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:50,830 INFO L225 Difference]: With dead ends: 907 [2019-11-07 04:41:50,830 INFO L226 Difference]: Without dead ends: 465 [2019-11-07 04:41:50,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:41:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2019-11-07 04:41:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2019-11-07 04:41:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-11-07 04:41:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 636 transitions. [2019-11-07 04:41:50,893 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 636 transitions. Word has length 42 [2019-11-07 04:41:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:50,893 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 636 transitions. [2019-11-07 04:41:50,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:41:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 636 transitions. [2019-11-07 04:41:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 04:41:50,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:50,895 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] [2019-11-07 04:41:50,895 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1757243213, now seen corresponding path program 1 times [2019-11-07 04:41:50,896 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:50,896 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367945919] [2019-11-07 04:41:50,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:51,046 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367945919] [2019-11-07 04:41:51,046 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:41:51,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:41:51,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752677398] [2019-11-07 04:41:51,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:41:51,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:41:51,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:41:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:41:51,048 INFO L87 Difference]: Start difference. First operand 465 states and 636 transitions. Second operand 8 states. [2019-11-07 04:41:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:41:51,354 INFO L93 Difference]: Finished difference Result 1155 states and 1611 transitions. [2019-11-07 04:41:51,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 04:41:51,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-07 04:41:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:41:51,361 INFO L225 Difference]: With dead ends: 1155 [2019-11-07 04:41:51,361 INFO L226 Difference]: Without dead ends: 1153 [2019-11-07 04:41:51,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:41:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2019-11-07 04:41:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 589. [2019-11-07 04:41:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-11-07 04:41:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 807 transitions. [2019-11-07 04:41:51,427 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 807 transitions. Word has length 42 [2019-11-07 04:41:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:41:51,428 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 807 transitions. [2019-11-07 04:41:51,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:41:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 807 transitions. [2019-11-07 04:41:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-07 04:41:51,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:41:51,430 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] [2019-11-07 04:41:51,431 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:41:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:41:51,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1027619730, now seen corresponding path program 1 times [2019-11-07 04:41:51,431 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:41:51,431 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012176337] [2019-11-07 04:41:51,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:41:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:52,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012176337] [2019-11-07 04:41:52,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45322976] [2019-11-07 04:41:52,030 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 [2019-11-07 04:41:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:41:52,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-07 04:41:52,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:41:52,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:52,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:41:52,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:52,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 04:41:53,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,281 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-11-07 04:41:53,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-07 04:41:53,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 04:41:53,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:53,779 WARN L191 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2019-11-07 04:41:53,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-11-07 04:41:53,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-07 04:41:54,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:41:54,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 04:41:54,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 04:41:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:41:54,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692934426] [2019-11-07 04:41:54,462 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2019-11-07 04:41:54,462 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:41:54,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:41:54,478 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:41:54,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:41:54,814 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2019-11-07 04:41:55,314 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2019-11-07 04:41:55,481 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-07 04:41:55,781 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2019-11-07 04:41:56,253 WARN L191 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 304 [2019-11-07 04:41:56,543 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-07 04:41:56,769 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2019-11-07 04:41:57,130 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-07 04:41:57,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 94 for LOIs [2019-11-07 04:41:57,811 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:41:58,879 WARN L191 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 94 [2019-11-07 04:41:59,666 WARN L191 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 138 [2019-11-07 04:42:00,419 WARN L191 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 146 [2019-11-07 04:42:01,272 WARN L191 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 150 [2019-11-07 04:42:02,227 WARN L191 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 158 [2019-11-07 04:42:03,091 WARN L191 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 157 [2019-11-07 04:42:03,944 WARN L191 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 155 [2019-11-07 04:42:04,889 WARN L191 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 152 [2019-11-07 04:42:05,789 WARN L191 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 155 [2019-11-07 04:42:06,717 WARN L191 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 154 [2019-11-07 04:42:07,619 WARN L191 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 152 [2019-11-07 04:42:08,684 WARN L191 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 150 [2019-11-07 04:42:09,591 WARN L191 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 153 [2019-11-07 04:42:10,513 WARN L191 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 152 [2019-11-07 04:42:11,477 WARN L191 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 150 [2019-11-07 04:42:12,476 WARN L191 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 147 [2019-11-07 04:42:13,558 WARN L191 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 150 [2019-11-07 04:42:14,665 WARN L191 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 152 [2019-11-07 04:42:15,795 WARN L191 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 154 [2019-11-07 04:42:16,782 WARN L191 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 160 [2019-11-07 04:42:18,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:42:18,798 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 41] total 79 [2019-11-07 04:42:18,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558255797] [2019-11-07 04:42:18,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-11-07 04:42:18,799 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:42:18,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-11-07 04:42:18,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=5295, Unknown=0, NotChecked=0, Total=6162 [2019-11-07 04:42:18,803 INFO L87 Difference]: Start difference. First operand 589 states and 807 transitions. Second operand 79 states. [2019-11-07 04:42:19,699 WARN L191 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 144 [2019-11-07 04:42:20,324 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2019-11-07 04:42:20,539 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2019-11-07 04:42:20,994 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2019-11-07 04:42:21,366 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2019-11-07 04:42:21,654 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 41 [2019-11-07 04:42:21,856 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2019-11-07 04:42:22,030 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2019-11-07 04:42:22,199 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-07 04:42:22,370 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2019-11-07 04:42:22,574 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2019-11-07 04:42:22,735 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2019-11-07 04:42:22,900 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2019-11-07 04:42:23,146 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2019-11-07 04:42:23,366 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-07 04:42:23,553 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2019-11-07 04:42:23,748 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-11-07 04:42:23,939 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2019-11-07 04:42:24,101 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2019-11-07 04:42:24,409 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2019-11-07 04:42:24,603 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2019-11-07 04:42:24,838 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2019-11-07 04:42:25,308 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2019-11-07 04:42:25,736 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 48 [2019-11-07 04:42:26,037 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2019-11-07 04:42:26,374 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2019-11-07 04:42:26,680 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2019-11-07 04:42:26,887 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2019-11-07 04:42:27,385 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 66 [2019-11-07 04:42:27,603 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-07 04:42:28,227 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2019-11-07 04:42:28,643 WARN L191 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 83 [2019-11-07 04:42:28,844 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2019-11-07 04:42:29,116 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 54