/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:11:24,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:11:24,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:11:24,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:11:24,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:11:24,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:11:24,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:11:24,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:11:24,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:11:24,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:11:24,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:11:24,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:11:24,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:11:24,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:11:24,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:11:24,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:11:24,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:11:24,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:11:24,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:11:24,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:11:24,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:11:24,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:11:24,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:11:24,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:11:24,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:11:25,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:11:25,030 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:11:25,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:11:25,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:11:25,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:11:25,033 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:11:25,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:11:25,034 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:11:25,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:11:25,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:11:25,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:11:25,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:11:25,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:11:25,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:11:25,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:11:25,036 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:11:25,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:11:25,037 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:11:25,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:11:25,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:11:25,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:11:25,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:11:25,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:11:25,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:25,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:11:25,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:11:25,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:11:25,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:11:25,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:11:25,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:11:25,369 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:11:25,370 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-23 22:11:25,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d5fb117/d41e899f3ee94040b3a62e4531a5ed8d/FLAG6b9775b57 [2019-11-23 22:11:25,887 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:11:25,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-23 22:11:25,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d5fb117/d41e899f3ee94040b3a62e4531a5ed8d/FLAG6b9775b57 [2019-11-23 22:11:26,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d5fb117/d41e899f3ee94040b3a62e4531a5ed8d [2019-11-23 22:11:26,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:11:26,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:11:26,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:26,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:11:26,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:11:26,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4027b29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26, skipping insertion in model container [2019-11-23 22:11:26,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:11:26,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:11:26,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:26,607 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:11:26,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:26,673 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:11:26,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26 WrapperNode [2019-11-23 22:11:26,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:26,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:26,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:11:26,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:11:26,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:26,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:11:26,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:11:26,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:11:26,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... [2019-11-23 22:11:26,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:11:26,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:11:26,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:11:26,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:11:26,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:11:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:11:27,190 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:11:27,190 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-23 22:11:27,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:27 BoogieIcfgContainer [2019-11-23 22:11:27,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:11:27,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:11:27,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:11:27,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:11:27,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:11:26" (1/3) ... [2019-11-23 22:11:27,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65792ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:27, skipping insertion in model container [2019-11-23 22:11:27,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:26" (2/3) ... [2019-11-23 22:11:27,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65792ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:27, skipping insertion in model container [2019-11-23 22:11:27,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:27" (3/3) ... [2019-11-23 22:11:27,214 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-11-23 22:11:27,222 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:11:27,229 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:11:27,240 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:11:27,269 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:11:27,269 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:11:27,270 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:11:27,270 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:11:27,270 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:11:27,270 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:11:27,270 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:11:27,271 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:11:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-23 22:11:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:11:27,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:27,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:27,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2019-11-23 22:11:27,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:27,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208228536] [2019-11-23 22:11:27,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:27,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208228536] [2019-11-23 22:11:27,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:27,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:11:27,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185630081] [2019-11-23 22:11:27,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:27,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:27,472 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-23 22:11:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:27,619 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2019-11-23 22:11:27,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:27,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 22:11:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:27,631 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:11:27,632 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:11:27,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:11:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:11:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:11:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-23 22:11:27,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2019-11-23 22:11:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:27,666 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-23 22:11:27,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-23 22:11:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:11:27,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:27,667 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:27,668 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2019-11-23 22:11:27,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:27,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256268029] [2019-11-23 22:11:27,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:27,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256268029] [2019-11-23 22:11:27,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:27,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:11:27,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049803645] [2019-11-23 22:11:27,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:11:27,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:11:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:27,714 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2019-11-23 22:11:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:27,840 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2019-11-23 22:11:27,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:11:27,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 22:11:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:27,842 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:11:27,842 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:11:27,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:11:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:11:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:11:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2019-11-23 22:11:27,854 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2019-11-23 22:11:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:27,854 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2019-11-23 22:11:27,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:11:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2019-11-23 22:11:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:11:27,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:27,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:27,856 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2019-11-23 22:11:27,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:27,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855750846] [2019-11-23 22:11:27,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:27,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855750846] [2019-11-23 22:11:27,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:27,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:11:27,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258388257] [2019-11-23 22:11:27,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:27,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:27,920 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 3 states. [2019-11-23 22:11:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:28,025 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2019-11-23 22:11:28,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:28,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 22:11:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:28,027 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:11:28,027 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:11:28,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:11:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 22:11:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:11:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-23 22:11:28,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2019-11-23 22:11:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:28,037 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-23 22:11:28,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-23 22:11:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:11:28,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:28,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,040 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2019-11-23 22:11:28,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259911582] [2019-11-23 22:11:28,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259911582] [2019-11-23 22:11:28,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:28,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-23 22:11:28,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172906689] [2019-11-23 22:11:28,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:11:28,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:11:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:11:28,268 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 12 states. [2019-11-23 22:11:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:28,427 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-11-23 22:11:28,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:11:28,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-23 22:11:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:28,429 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:11:28,429 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:11:28,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:11:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:11:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:11:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:11:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-23 22:11:28,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2019-11-23 22:11:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:28,440 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-23 22:11:28,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:11:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-23 22:11:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:11:28,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:28,442 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash 423677772, now seen corresponding path program 1 times [2019-11-23 22:11:28,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944436074] [2019-11-23 22:11:28,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944436074] [2019-11-23 22:11:28,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:28,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:11:28,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272358915] [2019-11-23 22:11:28,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:28,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:28,511 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 3 states. [2019-11-23 22:11:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:28,559 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-23 22:11:28,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:28,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:11:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:28,561 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:11:28,561 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:11:28,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:28,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:11:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:11:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:11:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-23 22:11:28,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2019-11-23 22:11:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:28,572 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-23 22:11:28,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-23 22:11:28,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:11:28,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,573 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:28,574 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,574 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2019-11-23 22:11:28,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620642672] [2019-11-23 22:11:28,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620642672] [2019-11-23 22:11:28,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806931347] [2019-11-23 22:11:28,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:11:28,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:28,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2019-11-23 22:11:28,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042700647] [2019-11-23 22:11:28,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:11:28,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:28,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:11:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:11:28,848 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-23 22:11:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:29,005 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-23 22:11:29,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:11:29,006 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-23 22:11:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:29,007 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:11:29,007 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:11:29,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:11:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:11:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 22:11:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:11:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-23 22:11:29,013 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2019-11-23 22:11:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:29,013 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-23 22:11:29,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:11:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-23 22:11:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:11:29,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:29,015 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:29,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,219 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:29,220 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 2 times [2019-11-23 22:11:29,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:29,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382219677] [2019-11-23 22:11:29,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382219677] [2019-11-23 22:11:29,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070514954] [2019-11-23 22:11:29,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:29,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:29,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:11:29,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:29,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-11-23 22:11:29,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303046069] [2019-11-23 22:11:29,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:11:29,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:11:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:11:29,497 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 16 states. [2019-11-23 22:11:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:29,639 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-23 22:11:29,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:11:29,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-23 22:11:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:29,640 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:11:29,641 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:11:29,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:11:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:11:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 22:11:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:11:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-23 22:11:29,655 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-11-23 22:11:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:29,656 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-23 22:11:29,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:11:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-23 22:11:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:11:29,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:29,660 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:29,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,863 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2038532154, now seen corresponding path program 3 times [2019-11-23 22:11:29,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:29,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133364343] [2019-11-23 22:11:29,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:30,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133364343] [2019-11-23 22:11:30,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856491170] [2019-11-23 22:11:30,113 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:11:30,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:30,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:11:30,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 22:11:30,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:30,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4] total 20 [2019-11-23 22:11:30,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402496245] [2019-11-23 22:11:30,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:11:30,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:11:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:30,216 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2019-11-23 22:11:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:30,335 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-11-23 22:11:30,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:11:30,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2019-11-23 22:11:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:30,336 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:11:30,336 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:11:30,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:11:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 22:11:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:11:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-23 22:11:30,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2019-11-23 22:11:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:30,343 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-23 22:11:30,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:11:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-23 22:11:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:11:30,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:30,344 INFO L410 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:30,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,545 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 699965998, now seen corresponding path program 4 times [2019-11-23 22:11:30,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:30,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817886716] [2019-11-23 22:11:30,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:30,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817886716] [2019-11-23 22:11:30,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344998070] [2019-11-23 22:11:30,806 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:30,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:30,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:11:30,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:30,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:30,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2019-11-23 22:11:30,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105631787] [2019-11-23 22:11:30,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:11:30,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:11:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:11:30,873 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2019-11-23 22:11:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:31,022 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-23 22:11:31,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:11:31,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2019-11-23 22:11:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:31,024 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:11:31,024 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:11:31,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:11:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:11:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 22:11:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 22:11:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-23 22:11:31,031 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2019-11-23 22:11:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:31,031 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-23 22:11:31,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:11:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-23 22:11:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:11:31,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:31,032 INFO L410 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:31,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:31,243 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1691649285, now seen corresponding path program 5 times [2019-11-23 22:11:31,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:31,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680939701] [2019-11-23 22:11:31,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:31,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680939701] [2019-11-23 22:11:31,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611976685] [2019-11-23 22:11:31,558 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:31,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:11:31,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:31,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:11:31,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 22:11:31,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:31,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2019-11-23 22:11:31,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606405579] [2019-11-23 22:11:31,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:11:31,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:11:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:11:31,784 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 30 states. [2019-11-23 22:11:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:31,960 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-23 22:11:31,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:11:31,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 47 [2019-11-23 22:11:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:31,962 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:11:31,962 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 22:11:31,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:11:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 22:11:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-23 22:11:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:11:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-23 22:11:31,969 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 47 [2019-11-23 22:11:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:31,970 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-23 22:11:31,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:11:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-23 22:11:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:11:31,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:31,971 INFO L410 BasicCegarLoop]: trace histogram [19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:32,175 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1432398724, now seen corresponding path program 6 times [2019-11-23 22:11:32,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977199250] [2019-11-23 22:11:32,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:32,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977199250] [2019-11-23 22:11:32,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703923451] [2019-11-23 22:11:32,622 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:32,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:11:32,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:32,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:11:32,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 22:11:32,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:32,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-11-23 22:11:32,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543813116] [2019-11-23 22:11:32,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:11:32,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:11:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:11:32,993 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 41 states. [2019-11-23 22:11:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:33,195 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-23 22:11:33,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:11:33,196 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 61 [2019-11-23 22:11:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:33,198 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:11:33,198 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 22:11:33,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:11:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 22:11:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 22:11:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:11:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-11-23 22:11:33,219 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 61 [2019-11-23 22:11:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:33,220 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-11-23 22:11:33,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:11:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-11-23 22:11:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:11:33,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:33,223 INFO L410 BasicCegarLoop]: trace histogram [30, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:33,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:33,438 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:33,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1851901513, now seen corresponding path program 7 times [2019-11-23 22:11:33,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:33,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596469371] [2019-11-23 22:11:33,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:34,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596469371] [2019-11-23 22:11:34,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854584148] [2019-11-23 22:11:34,267 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:34,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:11:34,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 399 proven. 420 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:11:34,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:34,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 42 [2019-11-23 22:11:34,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433198353] [2019-11-23 22:11:34,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:11:34,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:11:34,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:11:34,391 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2019-11-23 22:11:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:34,681 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2019-11-23 22:11:34,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:11:34,682 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2019-11-23 22:11:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:34,683 INFO L225 Difference]: With dead ends: 128 [2019-11-23 22:11:34,683 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 22:11:34,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:11:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 22:11:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-11-23 22:11:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 22:11:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2019-11-23 22:11:34,698 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 83 [2019-11-23 22:11:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:34,699 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2019-11-23 22:11:34,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:11:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2019-11-23 22:11:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 22:11:34,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:34,700 INFO L410 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:34,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:34,904 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash 347622326, now seen corresponding path program 8 times [2019-11-23 22:11:34,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:34,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284363255] [2019-11-23 22:11:34,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:36,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284363255] [2019-11-23 22:11:36,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212367727] [2019-11-23 22:11:36,126 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:36,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:36,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:11:36,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:11:36,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:36,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 43] total 53 [2019-11-23 22:11:36,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838018128] [2019-11-23 22:11:36,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:11:36,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:11:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:11:36,223 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2019-11-23 22:11:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:36,511 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2019-11-23 22:11:36,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:11:36,512 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2019-11-23 22:11:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:36,514 INFO L225 Difference]: With dead ends: 148 [2019-11-23 22:11:36,514 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 22:11:36,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:11:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 22:11:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-11-23 22:11:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:11:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2019-11-23 22:11:36,525 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 105 [2019-11-23 22:11:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:36,525 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2019-11-23 22:11:36,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:11:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2019-11-23 22:11:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:11:36,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:36,527 INFO L410 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:36,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,731 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:36,732 INFO L82 PathProgramCache]: Analyzing trace with hash -227664360, now seen corresponding path program 9 times [2019-11-23 22:11:36,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:36,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094715213] [2019-11-23 22:11:36,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:38,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094715213] [2019-11-23 22:11:38,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012352264] [2019-11-23 22:11:38,199 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:38,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:11:38,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:38,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:11:38,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 861 proven. 100 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-23 22:11:38,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:38,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 13] total 63 [2019-11-23 22:11:38,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736019959] [2019-11-23 22:11:38,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 22:11:38,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 22:11:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:11:38,279 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 63 states. [2019-11-23 22:11:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:38,633 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2019-11-23 22:11:38,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-23 22:11:38,634 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 125 [2019-11-23 22:11:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:38,635 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:11:38,635 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:11:38,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:11:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:11:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 22:11:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:11:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2019-11-23 22:11:38,644 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2019-11-23 22:11:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:38,644 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2019-11-23 22:11:38,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 22:11:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2019-11-23 22:11:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:11:38,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:38,646 INFO L410 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:38,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:38,849 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 250343698, now seen corresponding path program 10 times [2019-11-23 22:11:38,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:38,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553569452] [2019-11-23 22:11:38,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:40,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553569452] [2019-11-23 22:11:40,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332989176] [2019-11-23 22:11:40,493 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:40,545 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:40,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:40,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 22:11:40,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:40,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:40,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2019-11-23 22:11:40,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299968801] [2019-11-23 22:11:40,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 22:11:40,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 22:11:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 22:11:40,603 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 64 states. [2019-11-23 22:11:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:40,924 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2019-11-23 22:11:40,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-23 22:11:40,925 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 127 [2019-11-23 22:11:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:40,926 INFO L225 Difference]: With dead ends: 134 [2019-11-23 22:11:40,926 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:11:40,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 22:11:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:11:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 22:11:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 22:11:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-11-23 22:11:40,940 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2019-11-23 22:11:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:40,942 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-11-23 22:11:40,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 22:11:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-11-23 22:11:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 22:11:40,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:40,945 INFO L410 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:41,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:41,146 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 54586764, now seen corresponding path program 11 times [2019-11-23 22:11:41,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:41,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454124206] [2019-11-23 22:11:41,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:42,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454124206] [2019-11-23 22:11:42,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336340421] [2019-11-23 22:11:42,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:42,697 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2019-11-23 22:11:42,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:42,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:11:42,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 676 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-11-23 22:11:43,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:43,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 29] total 79 [2019-11-23 22:11:43,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784284068] [2019-11-23 22:11:43,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-11-23 22:11:43,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-11-23 22:11:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 22:11:43,419 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 79 states. [2019-11-23 22:11:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:43,786 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2019-11-23 22:11:43,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-11-23 22:11:43,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 129 [2019-11-23 22:11:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:43,788 INFO L225 Difference]: With dead ends: 164 [2019-11-23 22:11:43,788 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 22:11:43,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-11-23 22:11:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 22:11:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 22:11:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:11:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2019-11-23 22:11:43,798 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 129 [2019-11-23 22:11:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:43,798 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2019-11-23 22:11:43,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-11-23 22:11:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2019-11-23 22:11:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:11:43,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:43,800 INFO L410 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:44,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:44,004 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1986515790, now seen corresponding path program 12 times [2019-11-23 22:11:44,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:44,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376975659] [2019-11-23 22:11:44,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:46,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376975659] [2019-11-23 22:11:46,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435040924] [2019-11-23 22:11:46,257 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:46,390 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2019-11-23 22:11:46,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:46,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:11:46,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1089 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-11-23 22:11:46,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:46,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 36] total 86 [2019-11-23 22:11:46,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196340994] [2019-11-23 22:11:46,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-11-23 22:11:46,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-11-23 22:11:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-11-23 22:11:46,757 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 86 states. [2019-11-23 22:11:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:47,145 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2019-11-23 22:11:47,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-11-23 22:11:47,146 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 159 [2019-11-23 22:11:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:47,147 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:11:47,147 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:11:47,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-11-23 22:11:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:11:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-11-23 22:11:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 22:11:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2019-11-23 22:11:47,157 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2019-11-23 22:11:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:47,157 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2019-11-23 22:11:47,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-11-23 22:11:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2019-11-23 22:11:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:11:47,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:47,159 INFO L410 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:47,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:47,363 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 13 times [2019-11-23 22:11:47,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:47,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515746361] [2019-11-23 22:11:47,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:50,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515746361] [2019-11-23 22:11:50,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081772364] [2019-11-23 22:11:50,071 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:50,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 22:11:50,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:50,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:50,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2019-11-23 22:11:50,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143031364] [2019-11-23 22:11:50,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-11-23 22:11:50,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-11-23 22:11:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-11-23 22:11:50,219 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 87 states. [2019-11-23 22:11:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:50,695 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2019-11-23 22:11:50,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-11-23 22:11:50,696 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 173 [2019-11-23 22:11:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:50,697 INFO L225 Difference]: With dead ends: 180 [2019-11-23 22:11:50,697 INFO L226 Difference]: Without dead ends: 177 [2019-11-23 22:11:50,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-11-23 22:11:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-23 22:11:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2019-11-23 22:11:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 22:11:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2019-11-23 22:11:50,709 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2019-11-23 22:11:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:50,709 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2019-11-23 22:11:50,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-11-23 22:11:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2019-11-23 22:11:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:11:50,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:50,710 INFO L410 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:50,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:50,915 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1459758462, now seen corresponding path program 14 times [2019-11-23 22:11:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:50,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749433661] [2019-11-23 22:11:50,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:53,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749433661] [2019-11-23 22:11:53,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553272192] [2019-11-23 22:11:53,615 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:53,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:53,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:53,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-23 22:11:53,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:53,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:53,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2019-11-23 22:11:53,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635825899] [2019-11-23 22:11:53,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-11-23 22:11:53,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-11-23 22:11:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-11-23 22:11:53,740 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 88 states. [2019-11-23 22:11:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:54,186 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2019-11-23 22:11:54,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-11-23 22:11:54,187 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 175 [2019-11-23 22:11:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:54,188 INFO L225 Difference]: With dead ends: 182 [2019-11-23 22:11:54,188 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 22:11:54,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-11-23 22:11:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 22:11:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-11-23 22:11:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 22:11:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2019-11-23 22:11:54,196 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2019-11-23 22:11:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:54,196 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2019-11-23 22:11:54,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-11-23 22:11:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2019-11-23 22:11:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 22:11:54,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:54,198 INFO L410 BasicCegarLoop]: trace histogram [77, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:54,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:54,401 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1618885372, now seen corresponding path program 15 times [2019-11-23 22:11:54,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:54,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436202591] [2019-11-23 22:11:54,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:57,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436202591] [2019-11-23 22:11:57,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694647178] [2019-11-23 22:11:57,250 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:57,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2019-11-23 22:11:57,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:57,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:11:57,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1296 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-23 22:11:57,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:57,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 39] total 89 [2019-11-23 22:11:57,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802124117] [2019-11-23 22:11:57,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-11-23 22:11:57,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-11-23 22:11:57,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 22:11:57,424 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 89 states. [2019-11-23 22:11:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:57,849 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2019-11-23 22:11:57,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-23 22:11:57,850 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 177 [2019-11-23 22:11:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:57,852 INFO L225 Difference]: With dead ends: 184 [2019-11-23 22:11:57,852 INFO L226 Difference]: Without dead ends: 181 [2019-11-23 22:11:57,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 22:11:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-23 22:11:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2019-11-23 22:11:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 22:11:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2019-11-23 22:11:57,859 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2019-11-23 22:11:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:57,859 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2019-11-23 22:11:57,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-11-23 22:11:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2019-11-23 22:11:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:11:57,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:57,860 INFO L410 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:58,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:58,072 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 963142902, now seen corresponding path program 16 times [2019-11-23 22:11:58,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:58,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535127211] [2019-11-23 22:11:58,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:00,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535127211] [2019-11-23 22:12:00,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321540631] [2019-11-23 22:12:00,867 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:00,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:00,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:00,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-23 22:12:00,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2019-11-23 22:12:00,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306429815] [2019-11-23 22:12:00,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-11-23 22:12:00,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-11-23 22:12:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-11-23 22:12:00,990 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 90 states. [2019-11-23 22:12:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:01,413 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2019-11-23 22:12:01,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-11-23 22:12:01,413 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 179 [2019-11-23 22:12:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:01,415 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:12:01,415 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 22:12:01,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-11-23 22:12:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 22:12:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2019-11-23 22:12:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 22:12:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2019-11-23 22:12:01,422 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2019-11-23 22:12:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:01,423 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2019-11-23 22:12:01,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-11-23 22:12:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2019-11-23 22:12:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:12:01,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:01,424 INFO L410 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:01,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:01,627 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 17 times [2019-11-23 22:12:01,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:01,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650629259] [2019-11-23 22:12:01,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:04,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650629259] [2019-11-23 22:12:04,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858444585] [2019-11-23 22:12:04,448 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:04,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2019-11-23 22:12:04,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:04,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:12:04,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2019-11-23 22:12:04,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:04,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2019-11-23 22:12:04,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471509148] [2019-11-23 22:12:04,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-11-23 22:12:04,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-11-23 22:12:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:12:04,703 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 92 states. [2019-11-23 22:12:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:05,230 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2019-11-23 22:12:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-11-23 22:12:05,232 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 181 [2019-11-23 22:12:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:05,233 INFO L225 Difference]: With dead ends: 190 [2019-11-23 22:12:05,233 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:12:05,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:12:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:12:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:12:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:12:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2019-11-23 22:12:05,239 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2019-11-23 22:12:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:05,240 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2019-11-23 22:12:05,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-11-23 22:12:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2019-11-23 22:12:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:12:05,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:05,241 INFO L410 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:05,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:05,442 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 18 times [2019-11-23 22:12:05,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:05,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012197828] [2019-11-23 22:12:05,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012197828] [2019-11-23 22:12:08,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512922694] [2019-11-23 22:12:08,427 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:08,607 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2019-11-23 22:12:08,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:08,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 92 conjunts are in the unsatisfiable core [2019-11-23 22:12:08,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:08,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2019-11-23 22:12:08,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267565470] [2019-11-23 22:12:08,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-11-23 22:12:08,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-11-23 22:12:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:12:08,664 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 93 states. [2019-11-23 22:12:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:09,111 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2019-11-23 22:12:09,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-11-23 22:12:09,112 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 185 [2019-11-23 22:12:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:09,113 INFO L225 Difference]: With dead ends: 192 [2019-11-23 22:12:09,113 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:12:09,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:12:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:12:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:12:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:12:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2019-11-23 22:12:09,120 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2019-11-23 22:12:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:09,121 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2019-11-23 22:12:09,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-11-23 22:12:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2019-11-23 22:12:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:12:09,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:09,122 INFO L410 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:09,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:09,325 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 19 times [2019-11-23 22:12:09,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:09,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235772784] [2019-11-23 22:12:09,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235772784] [2019-11-23 22:12:12,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861185686] [2019-11-23 22:12:12,310 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:12,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 93 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:12,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2019-11-23 22:12:12,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412946462] [2019-11-23 22:12:12,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-23 22:12:12,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-23 22:12:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 22:12:12,448 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 94 states. [2019-11-23 22:12:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:12,823 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2019-11-23 22:12:12,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-11-23 22:12:12,824 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 187 [2019-11-23 22:12:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:12,826 INFO L225 Difference]: With dead ends: 194 [2019-11-23 22:12:12,826 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:12:12,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 22:12:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:12:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 22:12:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 22:12:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2019-11-23 22:12:12,833 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2019-11-23 22:12:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:12,833 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2019-11-23 22:12:12,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-11-23 22:12:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2019-11-23 22:12:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 22:12:12,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:12,834 INFO L410 BasicCegarLoop]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,035 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 20 times [2019-11-23 22:12:13,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080248918] [2019-11-23 22:12:13,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080248918] [2019-11-23 22:12:16,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285314666] [2019-11-23 22:12:16,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:16,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:16,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:16,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 94 conjunts are in the unsatisfiable core [2019-11-23 22:12:16,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:16,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2019-11-23 22:12:16,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646279570] [2019-11-23 22:12:16,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-11-23 22:12:16,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-11-23 22:12:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-23 22:12:16,811 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 95 states. [2019-11-23 22:12:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:17,502 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2019-11-23 22:12:17,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-11-23 22:12:17,502 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2019-11-23 22:12:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:17,505 INFO L225 Difference]: With dead ends: 196 [2019-11-23 22:12:17,505 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 22:12:17,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-23 22:12:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 22:12:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-23 22:12:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:12:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2019-11-23 22:12:17,514 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2019-11-23 22:12:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:17,515 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2019-11-23 22:12:17,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-11-23 22:12:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2019-11-23 22:12:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:12:17,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:17,518 INFO L410 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,731 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 21 times [2019-11-23 22:12:17,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984745257] [2019-11-23 22:12:17,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:20,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984745257] [2019-11-23 22:12:20,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344880376] [2019-11-23 22:12:20,912 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 85 check-sat command(s) [2019-11-23 22:12:21,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:21,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-23 22:12:21,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:21,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2019-11-23 22:12:21,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642166580] [2019-11-23 22:12:21,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-11-23 22:12:21,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-11-23 22:12:21,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-11-23 22:12:21,138 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 96 states. [2019-11-23 22:12:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:21,598 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2019-11-23 22:12:21,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-11-23 22:12:21,599 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 191 [2019-11-23 22:12:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:21,600 INFO L225 Difference]: With dead ends: 198 [2019-11-23 22:12:21,600 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 22:12:21,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-11-23 22:12:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 22:12:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 22:12:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:12:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2019-11-23 22:12:21,606 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2019-11-23 22:12:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:21,607 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2019-11-23 22:12:21,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-11-23 22:12:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2019-11-23 22:12:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 22:12:21,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:21,608 INFO L410 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:21,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,812 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 22 times [2019-11-23 22:12:21,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:21,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864826501] [2019-11-23 22:12:21,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:25,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864826501] [2019-11-23 22:12:25,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301750624] [2019-11-23 22:12:25,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:25,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:25,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:25,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 96 conjunts are in the unsatisfiable core [2019-11-23 22:12:25,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:25,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:25,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2019-11-23 22:12:25,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686404510] [2019-11-23 22:12:25,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-11-23 22:12:25,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-11-23 22:12:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 22:12:25,212 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 97 states. [2019-11-23 22:12:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:25,694 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2019-11-23 22:12:25,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-11-23 22:12:25,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 193 [2019-11-23 22:12:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:25,696 INFO L225 Difference]: With dead ends: 200 [2019-11-23 22:12:25,696 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 22:12:25,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 22:12:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 22:12:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 22:12:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 22:12:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2019-11-23 22:12:25,703 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2019-11-23 22:12:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:25,703 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2019-11-23 22:12:25,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-11-23 22:12:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2019-11-23 22:12:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 22:12:25,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:25,704 INFO L410 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:25,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:25,909 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 23 times [2019-11-23 22:12:25,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:25,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667807775] [2019-11-23 22:12:25,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:29,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667807775] [2019-11-23 22:12:29,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079511025] [2019-11-23 22:12:29,621 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:29,784 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 87 check-sat command(s) [2019-11-23 22:12:29,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:29,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 22:12:29,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-23 22:12:29,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:29,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2019-11-23 22:12:29,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574682287] [2019-11-23 22:12:29,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-11-23 22:12:29,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-11-23 22:12:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-11-23 22:12:29,832 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2019-11-23 22:12:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:30,335 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2019-11-23 22:12:30,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-11-23 22:12:30,335 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2019-11-23 22:12:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:30,337 INFO L225 Difference]: With dead ends: 202 [2019-11-23 22:12:30,337 INFO L226 Difference]: Without dead ends: 199 [2019-11-23 22:12:30,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-11-23 22:12:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-23 22:12:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2019-11-23 22:12:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-23 22:12:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2019-11-23 22:12:30,344 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2019-11-23 22:12:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:30,344 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2019-11-23 22:12:30,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-11-23 22:12:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2019-11-23 22:12:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-23 22:12:30,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:30,345 INFO L410 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:30,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:30,549 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 24 times [2019-11-23 22:12:30,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:30,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752134529] [2019-11-23 22:12:30,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:33,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752134529] [2019-11-23 22:12:33,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727737064] [2019-11-23 22:12:33,905 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:34,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2019-11-23 22:12:34,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:34,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 22:12:34,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-23 22:12:34,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:34,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 49] total 99 [2019-11-23 22:12:34,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872384737] [2019-11-23 22:12:34,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-11-23 22:12:34,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-11-23 22:12:34,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 22:12:34,112 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 99 states. [2019-11-23 22:12:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:34,603 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2019-11-23 22:12:34,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-11-23 22:12:34,604 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 197 [2019-11-23 22:12:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:34,605 INFO L225 Difference]: With dead ends: 204 [2019-11-23 22:12:34,605 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 22:12:34,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 22:12:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 22:12:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2019-11-23 22:12:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:12:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2019-11-23 22:12:34,612 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2019-11-23 22:12:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:34,613 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2019-11-23 22:12:34,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-11-23 22:12:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2019-11-23 22:12:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:12:34,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:34,614 INFO L410 BasicCegarLoop]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:34,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:34,818 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 25 times [2019-11-23 22:12:34,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:34,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713608706] [2019-11-23 22:12:34,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713608706] [2019-11-23 22:12:38,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220509421] [2019-11-23 22:12:38,194 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:38,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:38,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:38,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2019-11-23 22:12:38,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835337450] [2019-11-23 22:12:38,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-23 22:12:38,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-23 22:12:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 22:12:38,344 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 100 states. [2019-11-23 22:12:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:39,052 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2019-11-23 22:12:39,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-11-23 22:12:39,053 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 199 [2019-11-23 22:12:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:39,054 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:12:39,055 INFO L226 Difference]: Without dead ends: 203 [2019-11-23 22:12:39,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 22:12:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-23 22:12:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-11-23 22:12:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-23 22:12:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2019-11-23 22:12:39,066 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2019-11-23 22:12:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:39,066 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2019-11-23 22:12:39,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-11-23 22:12:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2019-11-23 22:12:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-23 22:12:39,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:39,069 INFO L410 BasicCegarLoop]: trace histogram [89, 48, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:39,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:39,276 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 26 times [2019-11-23 22:12:39,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:39,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003551021] [2019-11-23 22:12:39,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003551021] [2019-11-23 22:12:42,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164841277] [2019-11-23 22:12:42,851 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:42,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:42,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:42,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-23 22:12:42,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:42,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2019-11-23 22:12:42,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687363642] [2019-11-23 22:12:42,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-11-23 22:12:42,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-11-23 22:12:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 22:12:42,994 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 101 states. [2019-11-23 22:12:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:43,483 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2019-11-23 22:12:43,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-11-23 22:12:43,483 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2019-11-23 22:12:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:43,485 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:12:43,485 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 22:12:43,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 22:12:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 22:12:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2019-11-23 22:12:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 22:12:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2019-11-23 22:12:43,490 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2019-11-23 22:12:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:43,490 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2019-11-23 22:12:43,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-11-23 22:12:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2019-11-23 22:12:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 22:12:43,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:43,491 INFO L410 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:43,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,693 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:43,694 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 27 times [2019-11-23 22:12:43,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:43,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295614526] [2019-11-23 22:12:43,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:47,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295614526] [2019-11-23 22:12:47,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961532364] [2019-11-23 22:12:47,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 91 check-sat command(s) [2019-11-23 22:12:47,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:47,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-23 22:12:47,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:47,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:47,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2019-11-23 22:12:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801985826] [2019-11-23 22:12:47,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-11-23 22:12:47,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-11-23 22:12:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 22:12:47,776 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 102 states. [2019-11-23 22:12:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:48,276 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2019-11-23 22:12:48,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-11-23 22:12:48,277 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 203 [2019-11-23 22:12:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:48,278 INFO L225 Difference]: With dead ends: 209 [2019-11-23 22:12:48,278 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 22:12:48,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 22:12:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 22:12:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2019-11-23 22:12:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 22:12:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2019-11-23 22:12:48,285 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2019-11-23 22:12:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:48,285 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2019-11-23 22:12:48,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-11-23 22:12:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2019-11-23 22:12:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 22:12:48,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:48,286 INFO L410 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:48,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,495 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:48,496 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 28 times [2019-11-23 22:12:48,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:48,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382744072] [2019-11-23 22:12:48,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2019-11-23 22:12:50,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382744072] [2019-11-23 22:12:50,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137905942] [2019-11-23 22:12:50,346 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,430 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:50,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:50,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 108 conjunts are in the unsatisfiable core [2019-11-23 22:12:50,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:50,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2019-11-23 22:12:50,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:50,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2019-11-23 22:12:50,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421135339] [2019-11-23 22:12:50,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:12:50,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:12:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:12:50,646 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 55 states. [2019-11-23 22:12:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:52,470 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2019-11-23 22:12:52,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:12:52,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2019-11-23 22:12:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:52,473 INFO L225 Difference]: With dead ends: 212 [2019-11-23 22:12:52,473 INFO L226 Difference]: Without dead ends: 209 [2019-11-23 22:12:52,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:12:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-23 22:12:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-11-23 22:12:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 22:12:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2019-11-23 22:12:52,482 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2019-11-23 22:12:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:52,482 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2019-11-23 22:12:52,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:12:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2019-11-23 22:12:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 22:12:52,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:52,484 INFO L410 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:52,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,689 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 29 times [2019-11-23 22:12:52,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:52,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741685867] [2019-11-23 22:12:52,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat