java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:42:38,923 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:42:38,925 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:42:38,937 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:42:38,938 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:42:38,939 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:42:38,940 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:42:38,942 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:42:38,944 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:42:38,945 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:42:38,945 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:42:38,946 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:42:38,947 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:42:38,948 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:42:38,949 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:42:38,950 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:42:38,950 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:42:38,952 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:42:38,954 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:42:38,956 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:42:38,957 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:42:38,958 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:42:38,961 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 20:42:38,961 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 20:42:38,961 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 20:42:38,962 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 20:42:38,963 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 20:42:38,964 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 20:42:38,965 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 20:42:38,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 20:42:38,970 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 20:42:38,971 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 20:42:38,971 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 20:42:38,971 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 20:42:38,972 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 20:42:38,973 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 20:42:38,975 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:42:38,997 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:42:38,997 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:42:38,998 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:42:38,999 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:42:39,000 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:42:39,000 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:42:39,001 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:42:39,001 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:42:39,001 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:42:39,001 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:42:39,002 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:42:39,003 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:42:39,003 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:42:39,003 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:42:39,003 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:42:39,003 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:42:39,004 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:42:39,004 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:42:39,004 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:42:39,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:42:39,005 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:42:39,006 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:42:39,006 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:42:39,006 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:42:39,006 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:42:39,007 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:42:39,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:42:39,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:42:39,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:42:39,078 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:42:39,078 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:42:39,079 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-09-30 20:42:39,080 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-09-30 20:42:39,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:42:39,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:42:39,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:42:39,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:42:39,159 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:42:39,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:42:39,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:42:39,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:42:39,200 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:42:39,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/1) ... [2018-09-30 20:42:39,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:42:39,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:42:39,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:42:39,232 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:42:39,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (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 [2018-09-30 20:42:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:42:39,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:42:39,571 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:42:39,571 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:42:39 BoogieIcfgContainer [2018-09-30 20:42:39,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:42:39,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:42:39,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:42:39,576 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:42:39,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:42:39" (1/2) ... [2018-09-30 20:42:39,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18665baf and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:42:39, skipping insertion in model container [2018-09-30 20:42:39,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:42:39" (2/2) ... [2018-09-30 20:42:39,580 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-09-30 20:42:39,589 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:42:39,597 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:42:39,646 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:42:39,647 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:42:39,647 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:42:39,647 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:42:39,648 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:42:39,648 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:42:39,648 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:42:39,648 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:42:39,648 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:42:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 20:42:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:42:39,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:39,674 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:42:39,675 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:39,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:39,682 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-09-30 20:42:39,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:39,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:39,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:39,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:39,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:39,945 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:42:39,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:42:39,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:42:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:42:39,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:39,969 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-30 20:42:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:40,194 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 20:42:40,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:42:40,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:42:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:40,209 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:42:40,209 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:42:40,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:42:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-30 20:42:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:42:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:42:40,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-30 20:42:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:40,248 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:42:40,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:42:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:42:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:42:40,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:40,249 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:42:40,249 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:40,249 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:40,249 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-09-30 20:42:40,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:40,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:40,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:40,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:40,348 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:42:40,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:42:40,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:42:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:42:40,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:40,351 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-30 20:42:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:40,533 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 20:42:40,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:42:40,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:42:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:40,534 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:42:40,535 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:42:40,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:42:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:42:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:42:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:42:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:42:40,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 20:42:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:40,540 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:42:40,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:42:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:42:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:42:40,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:40,541 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:42:40,542 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:40,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-09-30 20:42:40,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:40,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:40,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:40,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:40,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:40,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:40,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:40,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:41,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:41,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-30 20:42:41,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:42:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:42:41,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:41,284 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-09-30 20:42:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:42,469 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-30 20:42:42,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:42:42,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 20:42:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:42,471 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:42:42,471 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:42:42,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:42:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:42:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:42:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 20:42:42,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-30 20:42:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:42,481 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 20:42:42,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:42:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 20:42:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:42:42,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:42,483 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-30 20:42:42,483 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:42,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-09-30 20:42:42,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:42,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:42,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:42,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:42,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:42,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:42,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:42,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:42,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:42,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:42,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:42,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:42,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:42:42,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:42:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:42:42,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:42,879 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-09-30 20:42:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:43,469 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-30 20:42:43,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:42:43,471 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-09-30 20:42:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:43,472 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:42:43,472 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:42:43,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:42:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:42:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:42:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:42:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 20:42:43,479 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-30 20:42:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:43,479 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 20:42:43,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:42:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 20:42:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:42:43,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:43,481 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-30 20:42:43,481 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:43,481 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-09-30 20:42:43,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:43,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:43,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:43,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:43,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:43,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:43,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:43,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:43,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:42:43,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:43,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:43,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:43,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-09-30 20:42:43,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:42:43,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:42:43,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:43,813 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-09-30 20:42:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:44,165 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-09-30 20:42:44,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:42:44,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-30 20:42:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:44,166 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:42:44,166 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:42:44,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:42:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:42:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:42:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:42:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 20:42:44,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-30 20:42:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:44,176 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 20:42:44,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:42:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 20:42:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:42:44,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:44,177 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-30 20:42:44,178 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:44,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-09-30 20:42:44,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:44,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:44,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:44,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:44,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:44,376 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:44,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:44,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:44,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:44,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-30 20:42:44,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:42:44,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:42:44,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:44,494 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-30 20:42:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:44,982 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-09-30 20:42:44,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:42:44,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-30 20:42:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:44,985 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:42:44,985 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:42:44,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:42:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:42:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-30 20:42:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:42:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 20:42:44,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-09-30 20:42:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:44,993 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 20:42:44,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:42:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 20:42:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:42:44,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:44,995 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-30 20:42:44,995 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:44,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-09-30 20:42:44,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:44,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:44,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:44,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:45,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:45,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:45,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:45,190 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:42:45,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:45,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:45,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:45,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 20:42:45,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:42:45,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:42:45,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:45,346 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-09-30 20:42:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:45,586 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 20:42:45,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:42:45,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-09-30 20:42:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:45,589 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:42:45,589 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:42:45,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:42:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:42:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:42:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:42:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 20:42:45,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-30 20:42:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:45,596 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 20:42:45,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:42:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 20:42:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:42:45,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:45,597 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-30 20:42:45,597 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:45,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:45,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-09-30 20:42:45,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:45,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:45,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:45,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:45,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:45,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:45,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:45,758 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:45,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 20:42:45,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:45,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:46,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:46,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-09-30 20:42:46,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:42:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:42:46,014 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:46,014 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-09-30 20:42:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:46,592 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-09-30 20:42:46,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:42:46,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-09-30 20:42:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:46,593 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:42:46,593 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:42:46,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:42:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:42:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:42:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:42:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 20:42:46,600 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-30 20:42:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 20:42:46,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:42:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 20:42:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:42:46,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:46,602 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-30 20:42:46,602 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:46,602 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-09-30 20:42:46,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:46,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:46,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:46,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:46,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:46,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:46,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:46,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:47,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:47,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-30 20:42:47,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:42:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:42:47,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:47,180 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-30 20:42:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:47,601 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 20:42:47,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:42:47,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-30 20:42:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:47,604 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:42:47,604 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:42:47,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:42:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:42:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-30 20:42:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:42:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 20:42:47,611 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-09-30 20:42:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:47,611 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 20:42:47,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:42:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 20:42:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:42:47,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:47,613 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-30 20:42:47,613 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:47,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-09-30 20:42:47,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:47,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:47,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:47,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:47,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:47,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:47,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:47,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:47,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:47,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:42:48,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:48,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-09-30 20:42:48,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:42:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:42:48,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:48,348 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-09-30 20:42:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:48,808 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 20:42:48,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:42:48,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-09-30 20:42:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:48,810 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:42:48,810 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:42:48,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:42:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:42:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:42:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:42:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 20:42:48,817 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-30 20:42:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:48,817 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 20:42:48,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:42:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 20:42:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:42:48,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:48,818 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-30 20:42:48,818 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:48,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-09-30 20:42:48,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:48,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:48,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:48,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:49,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:49,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:49,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:49,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 20:42:49,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:49,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:49,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:49,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-09-30 20:42:49,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:42:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:42:49,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:49,402 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-09-30 20:42:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:50,137 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-09-30 20:42:50,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:42:50,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-09-30 20:42:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:50,138 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:42:50,138 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:42:50,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:42:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:42:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:42:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:42:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 20:42:50,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-30 20:42:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:50,146 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 20:42:50,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:42:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 20:42:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:42:50,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:50,149 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-30 20:42:50,149 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:50,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-09-30 20:42:50,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:50,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:50,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:50,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:50,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:50,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:50,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:50,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:50,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:50,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:50,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:50,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-30 20:42:50,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:42:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:42:50,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:50,460 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-30 20:42:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:50,856 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 20:42:50,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:42:50,857 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-30 20:42:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:50,858 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:42:50,858 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:42:50,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:42:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:42:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-09-30 20:42:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:42:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 20:42:50,865 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-09-30 20:42:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:50,866 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 20:42:50,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:42:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 20:42:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:42:50,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:50,867 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-30 20:42:50,867 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:50,867 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-09-30 20:42:50,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:50,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:51,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:51,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:51,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:51,324 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:42:51,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:51,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:51,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:51,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 20:42:51,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:42:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:42:51,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:51,686 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-09-30 20:42:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:52,137 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 20:42:52,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:42:52,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-09-30 20:42:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:52,138 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:42:52,138 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:42:52,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:42:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:42:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:42:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:42:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 20:42:52,145 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-30 20:42:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:52,145 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 20:42:52,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:42:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 20:42:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:42:52,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:52,146 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-30 20:42:52,146 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:52,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-09-30 20:42:52,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:52,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:52,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:52,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:52,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:53,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:53,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:53,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:53,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:42:53,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:53,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:53,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:53,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-09-30 20:42:53,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:42:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:42:53,568 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:53,568 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-09-30 20:42:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:54,325 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-09-30 20:42:54,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:42:54,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-09-30 20:42:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:54,326 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:42:54,326 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:42:54,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:42:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:42:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:42:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:42:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 20:42:54,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-30 20:42:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:54,335 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 20:42:54,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:42:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 20:42:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:42:54,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:54,336 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-30 20:42:54,336 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:54,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-09-30 20:42:54,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:54,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:54,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:54,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:54,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:54,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:54,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:54,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:54,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:54,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-30 20:42:54,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:42:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:42:54,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:54,681 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-30 20:42:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:55,194 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-09-30 20:42:55,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:42:55,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-30 20:42:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:55,195 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:42:55,195 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:42:55,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:42:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:42:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-09-30 20:42:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:42:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 20:42:55,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-09-30 20:42:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:55,207 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 20:42:55,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:42:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 20:42:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:42:55,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:55,208 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-30 20:42:55,208 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:55,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-09-30 20:42:55,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:55,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:55,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:55,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:55,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:56,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:56,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:56,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:56,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:56,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:56,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:42:56,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:56,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-09-30 20:42:56,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:42:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:42:56,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:56,868 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-09-30 20:42:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:57,440 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 20:42:57,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:42:57,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-09-30 20:42:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:57,441 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:42:57,441 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:42:57,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:42:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:42:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:42:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:42:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 20:42:57,451 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-30 20:42:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:57,451 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 20:42:57,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:42:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 20:42:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:42:57,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:57,453 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-30 20:42:57,453 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:57,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-09-30 20:42:57,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:57,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:57,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:57,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:57,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:57,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:57,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:57,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:42:57,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:57,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:58,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:58,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-09-30 20:42:58,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:42:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:42:58,102 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:58,102 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-09-30 20:42:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:58,891 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-09-30 20:42:58,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:42:58,891 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-09-30 20:42:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:58,892 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:42:58,892 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:42:58,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:42:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:42:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:42:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:42:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 20:42:58,901 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-30 20:42:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:58,901 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 20:42:58,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:42:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 20:42:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:42:58,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:58,902 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-30 20:42:58,902 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:58,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-09-30 20:42:58,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:58,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:58,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:58,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:58,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:59,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:59,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:59,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:59,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:59,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:59,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:59,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:59,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-30 20:42:59,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:42:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:42:59,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:59,367 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-30 20:42:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:59,962 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 20:42:59,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:42:59,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-30 20:42:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:59,964 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:42:59,964 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:42:59,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:42:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:42:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-09-30 20:42:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:42:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 20:42:59,971 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-09-30 20:42:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:59,972 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 20:42:59,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:42:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 20:42:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:42:59,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:59,973 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-30 20:42:59,973 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:59,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:59,973 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-09-30 20:42:59,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:59,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:59,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:59,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:00,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:00,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:00,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:00,421 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 20:43:00,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:00,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:00,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:00,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 20:43:00,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:43:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:43:00,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:00,882 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-09-30 20:43:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:01,655 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 20:43:01,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:43:01,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-09-30 20:43:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:01,656 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:43:01,656 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:43:01,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:43:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:43:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:43:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:43:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 20:43:01,665 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-30 20:43:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:01,665 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 20:43:01,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:43:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 20:43:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:43:01,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:01,666 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-30 20:43:01,666 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:01,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-09-30 20:43:01,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:01,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:01,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:01,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:01,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:02,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:02,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:02,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:02,191 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 20:43:02,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:02,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:02,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:02,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-09-30 20:43:02,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:43:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:43:02,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:02,493 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-09-30 20:43:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:03,329 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-09-30 20:43:03,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:43:03,329 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-09-30 20:43:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:03,330 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:43:03,330 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:43:03,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:43:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:43:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:43:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:43:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 20:43:03,337 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-30 20:43:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:03,337 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 20:43:03,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:43:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 20:43:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:43:03,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:03,338 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-30 20:43:03,338 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:03,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-09-30 20:43:03,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:03,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:03,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:03,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:03,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:03,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:03,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:03,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:03,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:04,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:04,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-30 20:43:04,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:43:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:43:04,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:04,061 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-30 20:43:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:04,863 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 20:43:04,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:43:04,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-30 20:43:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:04,864 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:43:04,864 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:43:04,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:43:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:43:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-09-30 20:43:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:43:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 20:43:04,874 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-09-30 20:43:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:04,875 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 20:43:04,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:43:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 20:43:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:43:04,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:04,876 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-30 20:43:04,876 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:04,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-09-30 20:43:04,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:04,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:05,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:05,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:05,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:05,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:05,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:05,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:43:05,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:05,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-09-30 20:43:05,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:43:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:43:05,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:05,548 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-09-30 20:43:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:06,336 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 20:43:06,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:43:06,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-09-30 20:43:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:06,337 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:43:06,338 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:43:06,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:43:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:43:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:43:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:43:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 20:43:06,349 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-30 20:43:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:06,349 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 20:43:06,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:43:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 20:43:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:43:06,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:06,350 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-30 20:43:06,350 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:06,350 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-09-30 20:43:06,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:06,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:06,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:06,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:06,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:06,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:06,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:06,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:07,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:43:07,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:07,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:07,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:07,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-09-30 20:43:07,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:43:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:43:07,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:07,484 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-09-30 20:43:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:08,512 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-09-30 20:43:08,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:43:08,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-09-30 20:43:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:08,513 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:43:08,513 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:43:08,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:43:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:43:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:43:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:43:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 20:43:08,520 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-30 20:43:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:08,520 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 20:43:08,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:43:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 20:43:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:43:08,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:08,521 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-30 20:43:08,521 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:08,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-09-30 20:43:08,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:08,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:08,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:08,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:08,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:08,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:08,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:08,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:08,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:08,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:08,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:09,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:09,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-30 20:43:09,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:43:09,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:43:09,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:09,170 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-30 20:43:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:10,021 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-09-30 20:43:10,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:43:10,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-30 20:43:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:10,022 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:43:10,022 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:43:10,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:43:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:43:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-09-30 20:43:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:43:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 20:43:10,030 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-09-30 20:43:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:10,030 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 20:43:10,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:43:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 20:43:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:43:10,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:10,031 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-30 20:43:10,031 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:10,031 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:10,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-09-30 20:43:10,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:10,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:10,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:10,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:10,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:10,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:10,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:10,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:10,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:43:10,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:10,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:10,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:10,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 20:43:10,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:43:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:43:10,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:10,891 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-09-30 20:43:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:11,991 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 20:43:11,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:43:12,000 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-09-30 20:43:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:12,000 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:43:12,001 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:43:12,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:43:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:43:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:43:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:43:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 20:43:12,009 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-30 20:43:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:12,009 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 20:43:12,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:43:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 20:43:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:43:12,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:12,010 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-30 20:43:12,010 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:12,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:12,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-09-30 20:43:12,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:12,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:12,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:12,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:12,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:12,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:12,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:12,468 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 20:43:12,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:12,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:12,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:12,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-09-30 20:43:12,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:43:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:43:12,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:12,939 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-09-30 20:43:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:14,506 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-09-30 20:43:14,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:43:14,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-09-30 20:43:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:14,507 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:43:14,507 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:43:14,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:43:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:43:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:43:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 20:43:14,515 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-30 20:43:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 20:43:14,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:43:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 20:43:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:43:14,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:14,517 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-30 20:43:14,517 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:14,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-09-30 20:43:14,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:14,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:14,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:14,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:14,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:14,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:14,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:14,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:14,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:15,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:15,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-30 20:43:15,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:43:15,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:43:15,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:15,161 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-30 20:43:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:16,061 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 20:43:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:43:16,062 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-30 20:43:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:16,063 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:43:16,063 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:43:16,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:43:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:43:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-09-30 20:43:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:43:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 20:43:16,071 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-09-30 20:43:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:16,072 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 20:43:16,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:43:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 20:43:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:43:16,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:16,072 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-30 20:43:16,072 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:16,073 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-09-30 20:43:16,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:16,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:16,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:16,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:16,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:16,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:16,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:16,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:16,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:43:17,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:17,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-09-30 20:43:17,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:43:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:43:17,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:17,409 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-09-30 20:43:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:18,831 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 20:43:18,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:43:18,831 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-09-30 20:43:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:18,832 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:43:18,832 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:43:18,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:43:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:43:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:43:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:43:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 20:43:18,842 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-30 20:43:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:18,842 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 20:43:18,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:43:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 20:43:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:43:18,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:18,842 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-30 20:43:18,843 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:18,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-09-30 20:43:18,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:18,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:18,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:18,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:19,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:19,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:19,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:19,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 20:43:19,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:19,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:20,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:20,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-09-30 20:43:20,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:43:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:43:20,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:20,513 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-09-30 20:43:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:22,177 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-09-30 20:43:22,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:43:22,177 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-09-30 20:43:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:22,178 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:43:22,178 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:43:22,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:43:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:43:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:43:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:43:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 20:43:22,187 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-30 20:43:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:22,188 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 20:43:22,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:43:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 20:43:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:43:22,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:22,189 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-30 20:43:22,189 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:22,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-09-30 20:43:22,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:22,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:22,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:22,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:22,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:23,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:23,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:23,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:23,199 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:23,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:23,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:23,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:23,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-30 20:43:23,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:43:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:43:23,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:23,763 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-30 20:43:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:24,901 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 20:43:24,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:43:24,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-30 20:43:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:24,903 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:43:24,903 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:43:24,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:43:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:43:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-09-30 20:43:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:43:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 20:43:24,912 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-09-30 20:43:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:24,912 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 20:43:24,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:43:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 20:43:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:43:24,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:24,913 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-30 20:43:24,913 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:24,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-09-30 20:43:24,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:24,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:24,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:24,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:25,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:25,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:25,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:25,452 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:43:25,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:25,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:25,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:25,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 20:43:25,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:43:25,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:43:25,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:25,935 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-09-30 20:43:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:27,377 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 20:43:27,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:43:27,378 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-09-30 20:43:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:27,378 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:43:27,378 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:43:27,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:43:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:43:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:43:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:43:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 20:43:27,386 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-30 20:43:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:27,387 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 20:43:27,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:43:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 20:43:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:43:27,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:27,388 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-30 20:43:27,388 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:27,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-09-30 20:43:27,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:27,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:27,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:27,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:27,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:27,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:27,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:27,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:28,017 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:43:28,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:28,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:28,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:28,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-09-30 20:43:28,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:43:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:43:28,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:28,530 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-09-30 20:43:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:30,257 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-09-30 20:43:30,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:43:30,257 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-09-30 20:43:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:30,258 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:43:30,258 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:43:30,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:43:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:43:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:43:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:43:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 20:43:30,268 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-30 20:43:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:30,268 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 20:43:30,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:43:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 20:43:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:43:30,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:30,269 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-30 20:43:30,269 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:30,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-09-30 20:43:30,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:30,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:30,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:30,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:30,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:31,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:31,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:31,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:31,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:31,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:31,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-30 20:43:31,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:43:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:43:31,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:31,414 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-30 20:43:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:32,331 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-09-30 20:43:32,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:43:32,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-30 20:43:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:32,333 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:43:32,333 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:43:32,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:43:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-09-30 20:43:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:43:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 20:43:32,343 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-09-30 20:43:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:32,344 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 20:43:32,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:43:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 20:43:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:43:32,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:32,344 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-30 20:43:32,344 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:32,344 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-09-30 20:43:32,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:32,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:32,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:32,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:33,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:33,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:33,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:33,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:33,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:33,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:43:33,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:33,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-09-30 20:43:33,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:43:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:43:33,619 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:33,619 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-09-30 20:43:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:35,602 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 20:43:35,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:43:35,602 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-09-30 20:43:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:35,603 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:43:35,603 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:43:35,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:43:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:43:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:43:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:43:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 20:43:35,616 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-30 20:43:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:35,616 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 20:43:35,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:43:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 20:43:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:43:35,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:35,617 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-30 20:43:35,617 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:35,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-09-30 20:43:35,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:35,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:35,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:35,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:36,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:36,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:36,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:36,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:43:36,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:36,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:36,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:36,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-09-30 20:43:36,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:43:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:43:36,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:36,802 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-09-30 20:43:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:39,150 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-09-30 20:43:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:43:39,150 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-09-30 20:43:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:39,150 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:43:39,150 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:43:39,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:43:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:43:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:43:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:43:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 20:43:39,160 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-30 20:43:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:39,160 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 20:43:39,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:43:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 20:43:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:43:39,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:39,161 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-30 20:43:39,161 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:39,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-09-30 20:43:39,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:39,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:39,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:39,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:39,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:39,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:39,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:39,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:39,653 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:39,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:39,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:40,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:40,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-30 20:43:40,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:43:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:43:40,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:40,005 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-30 20:43:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:41,092 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 20:43:41,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:43:41,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-30 20:43:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:41,094 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:43:41,094 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:43:41,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:43:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:43:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-09-30 20:43:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:43:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 20:43:41,105 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-09-30 20:43:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:41,105 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 20:43:41,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:43:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 20:43:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:43:41,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:41,106 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-30 20:43:41,106 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:41,106 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:41,106 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-09-30 20:43:41,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:41,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:41,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:41,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:41,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:43,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:43,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:43,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:43,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 20:43:43,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:43,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:43,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:43,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 20:43:43,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:43:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:43:43,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:43,973 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-09-30 20:43:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:46,104 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 20:43:46,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:43:46,105 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-09-30 20:43:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:46,105 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:43:46,105 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:43:46,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-09-30 20:43:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:43:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:43:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:43:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 20:43:46,116 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-30 20:43:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:46,116 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 20:43:46,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:43:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 20:43:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:43:46,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:46,117 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-30 20:43:46,117 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:46,117 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-09-30 20:43:46,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:46,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:46,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:46,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:46,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:46,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:46,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:46,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:47,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 20:43:47,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:47,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:47,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:47,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-09-30 20:43:47,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:43:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:43:47,650 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:47,650 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-09-30 20:43:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:49,879 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-09-30 20:43:49,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:43:49,880 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-09-30 20:43:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:49,880 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:43:49,881 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:43:49,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:43:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:43:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:43:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:43:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 20:43:49,896 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-30 20:43:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:49,896 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 20:43:49,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:43:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 20:43:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:43:49,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:49,897 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-30 20:43:49,897 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:49,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-09-30 20:43:49,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:49,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:49,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:49,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:49,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:50,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:50,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:50,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:50,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:50,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:50,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-30 20:43:50,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:43:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:43:50,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:50,805 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-30 20:43:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:52,033 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 20:43:52,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:43:52,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-30 20:43:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:52,035 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:43:52,035 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:43:52,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:43:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:43:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-09-30 20:43:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:43:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 20:43:52,051 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-09-30 20:43:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:52,051 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 20:43:52,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:43:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 20:43:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:43:52,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:52,052 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-30 20:43:52,052 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:52,052 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-09-30 20:43:52,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:52,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:52,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:52,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:52,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:53,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:53,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:53,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:53,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:53,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:53,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:43:54,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:54,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-09-30 20:43:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:43:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:43:54,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:54,626 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-09-30 20:43:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:56,638 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 20:43:56,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:43:56,638 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-09-30 20:43:56,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:56,639 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:43:56,640 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:43:56,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-09-30 20:43:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:43:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:43:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:43:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 20:43:56,655 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-30 20:43:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:56,655 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 20:43:56,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:43:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 20:43:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:43:56,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:56,656 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-30 20:43:56,657 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:56,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-09-30 20:43:56,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:56,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:56,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:56,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:56,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:57,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:57,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:57,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:57,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:43:57,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:57,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:57,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:57,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-09-30 20:43:57,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:43:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:43:57,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:57,998 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-09-30 20:43:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:59,984 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-09-30 20:43:59,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:43:59,984 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-09-30 20:43:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:59,985 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:43:59,985 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:43:59,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:43:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:43:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:43:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:43:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 20:43:59,996 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-30 20:43:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:59,996 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 20:43:59,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:43:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 20:43:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:43:59,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:59,998 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-30 20:43:59,998 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:59,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-09-30 20:43:59,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:59,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:59,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:59,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:59,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:00,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:00,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:00,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:00,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:00,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:00,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:01,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:01,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-30 20:44:01,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:44:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:44:01,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:01,889 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-30 20:44:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:03,135 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-09-30 20:44:03,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:44:03,135 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-30 20:44:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:03,136 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:44:03,136 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:44:03,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:44:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:44:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-09-30 20:44:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:44:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-30 20:44:03,151 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-09-30 20:44:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:03,152 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-30 20:44:03,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:44:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-30 20:44:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:44:03,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:03,153 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-30 20:44:03,153 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:03,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:03,153 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-09-30 20:44:03,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:03,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:03,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:03,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:03,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:04,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:04,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:04,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:04,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:44:04,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:04,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:05,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:05,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-09-30 20:44:05,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:44:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:44:05,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:05,306 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-09-30 20:44:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:07,990 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-09-30 20:44:07,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:44:07,991 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-09-30 20:44:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:07,992 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:44:07,992 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:44:07,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:44:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:44:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:44:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:44:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-30 20:44:08,008 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-30 20:44:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:08,009 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-30 20:44:08,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:44:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-30 20:44:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:44:08,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:08,010 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-30 20:44:08,010 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:08,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:08,010 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-09-30 20:44:08,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:08,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:08,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:08,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:08,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:08,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:08,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:08,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:44:09,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 20:44:09,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:09,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:09,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:09,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-09-30 20:44:09,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:44:09,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:44:09,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:09,892 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-09-30 20:44:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:12,639 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-09-30 20:44:12,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:44:12,639 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-09-30 20:44:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:12,640 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:44:12,640 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:44:12,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:44:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:44:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:44:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:44:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-30 20:44:12,658 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-30 20:44:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:12,658 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-30 20:44:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:44:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-30 20:44:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:44:12,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:12,660 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-30 20:44:12,660 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:12,660 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:12,660 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-09-30 20:44:12,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:12,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:12,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:12,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:12,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:14,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:14,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:14,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:14,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:14,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:14,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-30 20:44:14,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:44:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:44:14,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:14,410 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-30 20:44:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:15,885 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 20:44:15,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:44:15,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-30 20:44:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:15,887 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:44:15,887 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:44:15,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:44:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:44:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-09-30 20:44:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:44:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-30 20:44:15,901 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-09-30 20:44:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:15,901 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-30 20:44:15,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:44:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-30 20:44:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:44:15,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:15,902 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-30 20:44:15,902 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:15,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-09-30 20:44:15,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:15,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:15,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:15,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:15,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:17,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:17,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:17,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:44:17,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:44:17,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:17,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:44:18,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:18,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-09-30 20:44:18,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:44:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:44:18,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:18,020 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-09-30 20:44:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:20,853 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-09-30 20:44:20,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:44:20,853 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-09-30 20:44:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:20,854 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:44:20,854 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:44:20,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-09-30 20:44:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:44:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:44:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:44:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-30 20:44:20,867 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-30 20:44:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:20,867 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-30 20:44:20,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:44:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-30 20:44:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:44:20,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:20,868 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-30 20:44:20,868 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:20,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:20,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-09-30 20:44:20,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:20,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:20,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:20,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:20,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:21,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:21,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:21,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:21,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-09-30 20:44:21,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:21,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:22,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:22,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-09-30 20:44:22,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:44:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:44:22,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:22,659 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-09-30 20:44:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:25,540 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-09-30 20:44:25,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:44:25,541 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-09-30 20:44:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:25,541 INFO L225 Difference]: With dead ends: 199 [2018-09-30 20:44:25,542 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:44:25,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:44:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:44:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:44:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:44:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-30 20:44:25,561 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-30 20:44:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:25,562 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-30 20:44:25,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:44:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-30 20:44:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:44:25,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:25,563 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-30 20:44:25,563 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:25,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-09-30 20:44:25,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:25,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:25,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:25,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:25,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:26,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:26,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:26,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:26,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:26,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:26,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:26,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:26,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-30 20:44:26,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:44:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:44:26,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:26,892 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-30 20:44:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:28,297 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 20:44:28,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:44:28,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-30 20:44:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:28,299 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:44:28,299 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:44:28,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:44:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:44:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-09-30 20:44:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:44:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-30 20:44:28,319 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-09-30 20:44:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:28,320 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-30 20:44:28,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:44:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-30 20:44:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:44:28,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:28,321 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-30 20:44:28,321 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:28,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-09-30 20:44:28,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:28,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:28,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:28,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:28,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:29,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:29,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:29,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:29,282 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:44:29,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:29,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:31,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:31,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-09-30 20:44:31,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:44:31,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:44:31,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:31,627 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-09-30 20:44:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:34,655 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-09-30 20:44:34,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:44:34,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-09-30 20:44:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:34,656 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:44:34,657 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:44:34,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time [2018-09-30 20:44:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:44:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:44:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:44:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-30 20:44:34,673 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-30 20:44:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:34,673 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-30 20:44:34,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:44:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-30 20:44:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:44:34,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:34,674 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-30 20:44:34,674 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:34,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-09-30 20:44:34,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:34,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:34,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:34,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:34,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:35,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:35,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:35,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:44:35,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:44:35,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:35,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:36,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:36,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-09-30 20:44:36,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:44:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:44:36,488 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:36,488 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-09-30 20:44:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:39,834 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-09-30 20:44:39,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:44:39,834 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-09-30 20:44:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:39,835 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:44:39,835 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:44:39,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:44:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:44:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:44:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:44:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-30 20:44:39,850 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-30 20:44:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:39,850 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-30 20:44:39,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:44:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-30 20:44:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:44:39,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:39,852 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-30 20:44:39,852 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:39,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-09-30 20:44:39,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:39,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:39,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:39,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:39,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:40,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:40,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:40,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:40,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:40,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:40,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-30 20:44:40,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:44:40,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:44:40,689 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:40,689 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-30 20:44:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:42,352 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-09-30 20:44:42,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:44:42,353 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-30 20:44:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:42,355 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:44:42,355 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:44:42,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:44:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:44:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-09-30 20:44:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:44:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-30 20:44:42,377 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-09-30 20:44:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:42,377 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-30 20:44:42,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:44:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-30 20:44:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:44:42,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:42,378 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-30 20:44:42,379 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:42,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-09-30 20:44:42,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:42,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:42,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:42,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:42,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:43,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:43,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:43,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:44:43,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:44:43,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:43,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:44:43,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:43,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-09-30 20:44:43,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:44:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:44:43,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:43,984 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-09-30 20:44:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:47,445 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-09-30 20:44:47,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:44:47,445 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-09-30 20:44:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:47,446 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:44:47,446 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:44:47,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:44:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:44:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:44:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:44:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-30 20:44:47,463 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-30 20:44:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:47,463 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-30 20:44:47,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:44:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-30 20:44:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:44:47,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:47,464 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-30 20:44:47,465 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:47,465 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-09-30 20:44:47,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:47,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:47,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:47,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:48,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:48,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:48,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:48,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:44:48,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:48,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:49,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:49,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-09-30 20:44:49,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:44:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:44:49,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:49,181 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-09-30 20:44:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:52,838 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-09-30 20:44:52,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:44:52,839 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-09-30 20:44:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:52,839 INFO L225 Difference]: With dead ends: 223 [2018-09-30 20:44:52,839 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:44:52,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:44:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:44:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:44:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:44:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-30 20:44:52,856 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-30 20:44:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:52,856 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-30 20:44:52,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:44:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-30 20:44:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:44:52,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:52,857 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-30 20:44:52,857 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:52,857 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-09-30 20:44:52,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:52,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:52,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:52,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:52,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:53,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:53,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:53,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:53,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:53,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:53,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:53,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:53,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-30 20:44:53,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:44:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:44:53,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:53,618 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-30 20:44:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:55,250 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 20:44:55,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:44:55,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-30 20:44:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:55,252 INFO L225 Difference]: With dead ends: 156 [2018-09-30 20:44:55,252 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:44:55,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:44:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:44:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-09-30 20:44:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:44:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-30 20:44:55,272 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-09-30 20:44:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:55,272 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-30 20:44:55,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:44:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-30 20:44:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:44:55,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:55,274 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-30 20:44:55,274 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:55,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-09-30 20:44:55,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:55,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:55,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:55,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:55,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:55,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:55,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:55,991 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:56,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-09-30 20:44:56,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:56,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:57,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:57,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-09-30 20:44:57,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:44:57,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:44:57,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:57,319 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-09-30 20:45:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:00,904 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-09-30 20:45:00,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:45:00,905 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-09-30 20:45:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:00,905 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:45:00,906 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:45:00,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:45:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:45:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:45:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:45:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-30 20:45:00,924 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-30 20:45:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:00,924 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-30 20:45:00,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:45:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-30 20:45:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:45:00,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:00,925 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-30 20:45:00,925 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:00,925 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-09-30 20:45:00,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:00,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:00,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:00,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:00,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:01,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:01,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:01,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:45:01,914 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 20:45:01,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:01,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:02,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:02,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-09-30 20:45:02,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:45:02,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:45:02,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:02,860 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-09-30 20:45:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:06,839 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-09-30 20:45:06,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:45:06,839 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-09-30 20:45:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:06,840 INFO L225 Difference]: With dead ends: 235 [2018-09-30 20:45:06,840 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:45:06,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:45:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:45:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:45:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:45:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-30 20:45:06,858 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-30 20:45:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:06,859 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-30 20:45:06,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:45:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-30 20:45:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:45:06,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:06,860 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-30 20:45:06,860 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:06,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-09-30 20:45:06,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:06,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:06,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:07,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:07,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:07,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:07,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:08,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:08,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-30 20:45:08,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:45:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:45:08,048 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:08,049 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-30 20:45:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:09,756 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 20:45:09,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:45:09,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-30 20:45:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:09,757 INFO L225 Difference]: With dead ends: 164 [2018-09-30 20:45:09,757 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:45:09,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:45:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:45:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-09-30 20:45:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:45:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-30 20:45:09,776 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-09-30 20:45:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:09,776 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-30 20:45:09,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:45:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-30 20:45:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:45:09,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:09,777 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-30 20:45:09,777 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:09,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-09-30 20:45:09,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:09,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:09,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:10,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:10,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:10,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:45:10,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:45:10,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:10,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:45:11,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:11,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-09-30 20:45:11,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:45:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:45:11,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:11,602 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-09-30 20:45:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:15,926 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-09-30 20:45:15,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:45:15,926 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-09-30 20:45:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:15,927 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:45:15,927 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:45:15,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:45:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:45:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:45:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:45:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-30 20:45:15,944 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-30 20:45:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:15,945 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-30 20:45:15,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:45:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-30 20:45:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:45:15,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:15,945 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-30 20:45:15,946 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:15,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-09-30 20:45:15,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:15,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:15,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:16,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:16,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:16,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:45:16,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:45:16,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:16,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:18,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:18,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-09-30 20:45:18,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:45:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:45:18,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:18,188 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-09-30 20:45:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:22,646 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-09-30 20:45:22,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:45:22,646 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-09-30 20:45:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:22,647 INFO L225 Difference]: With dead ends: 247 [2018-09-30 20:45:22,647 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 20:45:22,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:45:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 20:45:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 20:45:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:45:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-30 20:45:22,667 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-30 20:45:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:22,667 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-30 20:45:22,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:45:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-30 20:45:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:45:22,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:22,668 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-30 20:45:22,668 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:22,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-09-30 20:45:22,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:22,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:22,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:22,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:22,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:23,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:23,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:23,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:45:23,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:45:23,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:23,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:23,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:23,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-30 20:45:23,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:45:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:45:23,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:23,560 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-30 20:45:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:25,380 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-09-30 20:45:25,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:45:25,381 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-30 20:45:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:25,382 INFO L225 Difference]: With dead ends: 172 [2018-09-30 20:45:25,382 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 20:45:25,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:45:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 20:45:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-09-30 20:45:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 20:45:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-30 20:45:25,404 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-09-30 20:45:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:25,404 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-30 20:45:25,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:45:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-30 20:45:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 20:45:25,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:25,405 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-30 20:45:25,406 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:25,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-09-30 20:45:25,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:25,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:25,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:25,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:25,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:26,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:26,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:26,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:45:26,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:45:26,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:26,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:27,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:27,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-09-30 20:45:27,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:45:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:45:27,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:27,688 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-09-30 20:45:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:32,432 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-09-30 20:45:32,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:45:32,432 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-09-30 20:45:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:32,433 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:45:32,433 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:45:32,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:45:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:45:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:45:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:45:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-30 20:45:32,457 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-30 20:45:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:32,457 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-30 20:45:32,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:45:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-30 20:45:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:45:32,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:32,459 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-30 20:45:32,459 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:32,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-09-30 20:45:32,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:32,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:32,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:32,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:32,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:33,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:33,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:33,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:45:33,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-09-30 20:45:33,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:33,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:34,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:34,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-09-30 20:45:34,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:45:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:45:34,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:34,807 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-09-30 20:45:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:39,585 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-09-30 20:45:39,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:45:39,585 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-09-30 20:45:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:39,586 INFO L225 Difference]: With dead ends: 259 [2018-09-30 20:45:39,586 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:45:39,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:45:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:45:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 20:45:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:45:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-30 20:45:39,611 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-30 20:45:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:39,611 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-30 20:45:39,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:45:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-30 20:45:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:45:39,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:39,612 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-30 20:45:39,613 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:39,613 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-09-30 20:45:39,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:39,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:39,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:40,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:40,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:40,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:40,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:40,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:40,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-30 20:45:40,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:45:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:45:40,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:40,571 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-30 20:45:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:42,506 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 20:45:42,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:45:42,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-30 20:45:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:42,508 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:45:42,508 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 20:45:42,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:45:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 20:45:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-09-30 20:45:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 20:45:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-30 20:45:42,541 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-09-30 20:45:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:42,541 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-30 20:45:42,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:45:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-30 20:45:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 20:45:42,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:42,543 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-30 20:45:42,543 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:42,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-09-30 20:45:42,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:42,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:42,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:42,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:45:42,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:43,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:43,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:43,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:45:43,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:45:43,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:43,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:45:44,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:44,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-09-30 20:45:44,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:45:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:45:44,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:44,904 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-09-30 20:45:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:50,173 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-09-30 20:45:50,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:45:50,173 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-09-30 20:45:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:50,174 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:45:50,174 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:45:50,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-09-30 20:45:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:45:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 20:45:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 20:45:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-30 20:45:50,197 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-30 20:45:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:50,198 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-30 20:45:50,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:45:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-30 20:45:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:45:50,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:50,199 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-30 20:45:50,200 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:50,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:50,200 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-09-30 20:45:50,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:50,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:50,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:50,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:50,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:51,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:51,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:51,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:45:51,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-09-30 20:45:51,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:51,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:52,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:52,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-09-30 20:45:52,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:45:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:45:52,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:52,518 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-09-30 20:45:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:45:57,787 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-09-30 20:45:57,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:45:57,787 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-09-30 20:45:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:45:57,788 INFO L225 Difference]: With dead ends: 271 [2018-09-30 20:45:57,788 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:45:57,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-09-30 20:45:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:45:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:45:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:45:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-30 20:45:57,811 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-30 20:45:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:45:57,811 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-30 20:45:57,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:45:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-30 20:45:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 20:45:57,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:45:57,812 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-30 20:45:57,812 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:45:57,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:45:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-09-30 20:45:57,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:45:57,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:45:57,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:57,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:45:57,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:45:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:45:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:58,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:45:58,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:45:58,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:45:58,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:45:58,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:45:58,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:45:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:45:59,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:45:59,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-30 20:45:59,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:45:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:45:59,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:45:59,044 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-30 20:46:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:01,026 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-30 20:46:01,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:46:01,026 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-30 20:46:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:01,027 INFO L225 Difference]: With dead ends: 188 [2018-09-30 20:46:01,027 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 20:46:01,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:46:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 20:46:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-09-30 20:46:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:46:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-30 20:46:01,052 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-09-30 20:46:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:01,052 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-30 20:46:01,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:46:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-30 20:46:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 20:46:01,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:01,053 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-30 20:46:01,053 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:01,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-09-30 20:46:01,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:01,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:01,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:01,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:01,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:01,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:01,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:01,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:46:02,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:46:02,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:02,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:03,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:03,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-09-30 20:46:03,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:46:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:46:03,495 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:03,495 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-09-30 20:46:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:07,464 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-09-30 20:46:07,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:46:07,464 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-09-30 20:46:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:07,465 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:46:07,465 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:46:07,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-09-30 20:46:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:46:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:46:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:46:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-30 20:46:07,499 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-30 20:46:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:07,499 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-30 20:46:07,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:46:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-30 20:46:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 20:46:07,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:07,501 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-30 20:46:07,501 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:07,501 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-09-30 20:46:07,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:07,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:07,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:07,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:07,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:08,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:08,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:08,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:46:09,216 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:46:09,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:09,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:10,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:10,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-09-30 20:46:10,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:46:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:46:10,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:10,397 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-09-30 20:46:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:16,079 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-09-30 20:46:16,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:46:16,079 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-09-30 20:46:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:16,080 INFO L225 Difference]: With dead ends: 283 [2018-09-30 20:46:16,080 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 20:46:16,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time [2018-09-30 20:46:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 20:46:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 20:46:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 20:46:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-30 20:46:16,109 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-30 20:46:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:16,109 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-30 20:46:16,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:46:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-30 20:46:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:46:16,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:16,110 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-30 20:46:16,111 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:16,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-09-30 20:46:16,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:16,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:16,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:16,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:16,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:16,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:16,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:16,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:16,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:17,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:17,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-30 20:46:17,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:46:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:46:17,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:17,208 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-30 20:46:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:19,493 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-09-30 20:46:19,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:46:19,494 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-30 20:46:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:19,494 INFO L225 Difference]: With dead ends: 196 [2018-09-30 20:46:19,495 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:46:19,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:46:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:46:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-09-30 20:46:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:46:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-30 20:46:19,521 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-09-30 20:46:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:19,522 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-30 20:46:19,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:46:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-30 20:46:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 20:46:19,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:19,523 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-30 20:46:19,523 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:19,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-09-30 20:46:19,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:19,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:19,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:19,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:46:19,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:20,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:20,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:20,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:46:20,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:46:20,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:20,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-30 20:46:21,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:21,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-09-30 20:46:21,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:46:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:46:21,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:21,868 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-09-30 20:46:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:26,040 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-09-30 20:46:26,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:46:26,040 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-09-30 20:46:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:26,041 INFO L225 Difference]: With dead ends: 293 [2018-09-30 20:46:26,041 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:46:26,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-09-30 20:46:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:46:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 20:46:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:46:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-30 20:46:26,068 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-30 20:46:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:26,068 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-30 20:46:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:46:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-30 20:46:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:46:26,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:26,069 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-30 20:46:26,069 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:26,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-09-30 20:46:26,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:26,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:26,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:27,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:27,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:27,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:46:27,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:46:27,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:27,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:28,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:28,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-09-30 20:46:28,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:46:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:46:28,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:28,783 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-09-30 20:46:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:33,467 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-09-30 20:46:33,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:46:33,467 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-09-30 20:46:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:33,468 INFO L225 Difference]: With dead ends: 295 [2018-09-30 20:46:33,468 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 20:46:33,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-09-30 20:46:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 20:46:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 20:46:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 20:46:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-30 20:46:33,494 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-30 20:46:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:33,494 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-30 20:46:33,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:46:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-30 20:46:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 20:46:33,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:33,495 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-30 20:46:33,496 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:33,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-09-30 20:46:33,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:33,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:33,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:33,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:34,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:46:34,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:46:34,269 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:46:34,425 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:46:34,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:46:34,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:46:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:46:34,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:46:34,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-30 20:46:34,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:46:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:46:34,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:46:34,813 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-30 20:46:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:46:36,971 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-09-30 20:46:36,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:46:36,972 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-30 20:46:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:46:36,973 INFO L225 Difference]: With dead ends: 204 [2018-09-30 20:46:36,973 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 20:46:36,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:46:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 20:46:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-09-30 20:46:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 20:46:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-30 20:46:37,013 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-09-30 20:46:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:46:37,013 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-30 20:46:37,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:46:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-30 20:46:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 20:46:37,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:46:37,015 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-30 20:46:37,015 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:46:37,015 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:46:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-09-30 20:46:37,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:46:37,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:46:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:46:37,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:46:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY Received shutdown request... [2018-09-30 20:46:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:46:37,089 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-09-30 20:46:37,093 INFO L168 Benchmark]: Toolchain (without parser) took 237939.65 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -99.6 MB). Free memory was 1.5 GB in the beginning and 916.7 MB in the end (delta: 533.7 MB). Peak memory consumption was 434.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:46:37,095 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:46:37,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:46:37,096 INFO L168 Benchmark]: Boogie Preprocessor took 25.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:46:37,096 INFO L168 Benchmark]: RCFGBuilder took 345.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:46:37,097 INFO L168 Benchmark]: TraceAbstraction took 237519.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -99.6 MB). Free memory was 1.4 GB in the beginning and 916.7 MB in the end (delta: 512.6 MB). Peak memory consumption was 413.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:46:37,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.69 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 345.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237519.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -99.6 MB). Free memory was 1.4 GB in the beginning and 916.7 MB in the end (delta: 512.6 MB). Peak memory consumption was 413.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-46-37-118.csv Completed graceful shutdown