/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/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:33:10,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:33:10,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:33:10,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:33:10,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:33:10,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:33:10,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:33:10,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:33:10,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:33:10,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:33:10,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:33:10,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:33:10,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:33:10,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:33:10,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:33:10,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:33:10,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:33:10,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:33:10,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:33:10,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:33:10,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:33:10,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:33:10,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:33:10,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:33:10,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:33:10,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:33:10,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:33:10,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:33:10,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:33:10,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:33:10,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:33:10,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:33:10,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:33:10,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:33:10,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:33:10,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:33:10,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:33:10,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:33:10,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:33:10,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:33:10,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:33:10,066 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 20:33:10,089 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:33:10,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:33:10,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:33:10,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:33:10,092 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:33:10,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:33:10,092 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:33:10,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:33:10,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:33:10,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:33:10,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:33:10,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:33:10,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:33:10,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:33:10,095 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:33:10,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:33:10,095 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:33:10,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:33:10,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:33:10,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:33:10,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:33:10,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:33:10,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:33:10,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:33:10,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:33:10,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:33:10,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:33:10,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:33:10,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:33:10,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:33:10,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:33:10,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:33:10,402 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:33:10,404 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:33:10,404 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:33:10,405 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-11-23 20:33:10,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45d9a93e/0f53d340de9b48e58f581138fc698809/FLAGf92ef945e [2019-11-23 20:33:10,908 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:33:10,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-11-23 20:33:10,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45d9a93e/0f53d340de9b48e58f581138fc698809/FLAGf92ef945e [2019-11-23 20:33:11,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45d9a93e/0f53d340de9b48e58f581138fc698809 [2019-11-23 20:33:11,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:33:11,314 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:33:11,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:11,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:33:11,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:33:11,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35abdc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11, skipping insertion in model container [2019-11-23 20:33:11,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:33:11,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:33:11,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:11,601 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:33:11,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:11,647 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:33:11,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11 WrapperNode [2019-11-23 20:33:11,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:11,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:11,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:33:11,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:33:11,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:11,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:33:11,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:33:11,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:33:11,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:33:11,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:33:11,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:33:11,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:33:11,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (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 20:33:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:33:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:33:11,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:33:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:33:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:33:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:33:12,204 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:33:12,205 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:33:12,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:12 BoogieIcfgContainer [2019-11-23 20:33:12,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:33:12,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:33:12,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:33:12,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:33:12,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:11" (1/3) ... [2019-11-23 20:33:12,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cec0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:12, skipping insertion in model container [2019-11-23 20:33:12,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11" (2/3) ... [2019-11-23 20:33:12,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cec0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:12, skipping insertion in model container [2019-11-23 20:33:12,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:12" (3/3) ... [2019-11-23 20:33:12,227 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2019-11-23 20:33:12,245 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:33:12,253 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:33:12,274 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:33:12,298 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:33:12,298 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:33:12,298 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:33:12,299 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:33:12,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:33:12,299 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:33:12,299 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:33:12,299 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:33:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-23 20:33:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:33:12,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:12,325 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:12,326 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 227193477, now seen corresponding path program 1 times [2019-11-23 20:33:12,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:12,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033280232] [2019-11-23 20:33:12,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,471 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 20:33:12,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033280232] [2019-11-23 20:33:12,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:12,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:33:12,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223410970] [2019-11-23 20:33:12,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:33:12,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:33:12,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:12,498 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-23 20:33:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:12,518 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2019-11-23 20:33:12,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:33:12,520 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:33:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:12,530 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:33:12,530 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:33:12,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:33:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:33:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:33:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:33:12,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2019-11-23 20:33:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:12,573 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:33:12,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:33:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:33:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:33:12,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:12,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:12,575 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash 217034746, now seen corresponding path program 1 times [2019-11-23 20:33:12,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:12,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781390439] [2019-11-23 20:33:12,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,629 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 20:33:12,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781390439] [2019-11-23 20:33:12,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:12,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:12,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605743250] [2019-11-23 20:33:12,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:12,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:12,633 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-23 20:33:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:12,671 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-11-23 20:33:12,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:12,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:33:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:12,673 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:33:12,674 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:33:12,675 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 20:33:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:33:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 20:33:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:33:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 20:33:12,681 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2019-11-23 20:33:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:12,682 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 20:33:12,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 20:33:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:12,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:12,684 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:12,684 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1440932604, now seen corresponding path program 1 times [2019-11-23 20:33:12,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:12,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497834618] [2019-11-23 20:33:12,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:12,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497834618] [2019-11-23 20:33:12,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:12,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:12,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765959428] [2019-11-23 20:33:12,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:12,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:12,783 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-11-23 20:33:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:12,819 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-23 20:33:12,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:12,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:33:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:12,821 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:33:12,821 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:33:12,822 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 20:33:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:33:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-23 20:33:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:33:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-23 20:33:12,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2019-11-23 20:33:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:12,828 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-23 20:33:12,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-23 20:33:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:33:12,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:12,829 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:12,829 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1060419033, now seen corresponding path program 1 times [2019-11-23 20:33:12,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:12,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400929298] [2019-11-23 20:33:12,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:12,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400929298] [2019-11-23 20:33:12,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324531909] [2019-11-23 20:33:12,894 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 20:33:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:12,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:12,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:12,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:33:12,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966114952] [2019-11-23 20:33:12,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:12,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:12,999 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-11-23 20:33:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,031 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-23 20:33:13,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:33:13,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-23 20:33:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,032 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:33:13,032 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:33:13,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:33:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 20:33:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:33:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-23 20:33:13,038 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2019-11-23 20:33:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,038 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-23 20:33:13,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-23 20:33:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:33:13,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,040 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:13,241 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 575252581, now seen corresponding path program 2 times [2019-11-23 20:33:13,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740333961] [2019-11-23 20:33:13,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740333961] [2019-11-23 20:33:13,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782256470] [2019-11-23 20:33:13,324 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 20:33:13,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:13,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:13,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:13,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:13,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:33:13,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519207437] [2019-11-23 20:33:13,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:33:13,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:33:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:13,398 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-11-23 20:33:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,428 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-23 20:33:13,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:33:13,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-23 20:33:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,431 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:33:13,431 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:33:13,432 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:33:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 20:33:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:33:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:33:13,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2019-11-23 20:33:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,438 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:33:13,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:33:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:33:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:33:13,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,440 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:13,642 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash 497643299, now seen corresponding path program 3 times [2019-11-23 20:33:13,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545648062] [2019-11-23 20:33:13,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545648062] [2019-11-23 20:33:13,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96363204] [2019-11-23 20:33:13,717 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 20:33:13,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:33:13,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:13,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:13,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:33:13,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:13,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:33:13,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687913641] [2019-11-23 20:33:13,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:33:13,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:33:13,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:13,803 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2019-11-23 20:33:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,922 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-23 20:33:13,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:33:13,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-23 20:33:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,924 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:33:13,924 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:33:13,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:33:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-11-23 20:33:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:33:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-23 20:33:13,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2019-11-23 20:33:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,930 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-23 20:33:13,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:33:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-23 20:33:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:13,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,932 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:14,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:14,136 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1186969762, now seen corresponding path program 4 times [2019-11-23 20:33:14,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:14,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107917852] [2019-11-23 20:33:14,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:33:14,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107917852] [2019-11-23 20:33:14,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150475999] [2019-11-23 20:33:14,224 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 20:33:14,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:14,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:14,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:33:14,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:33:14,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:14,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:33:14,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028773646] [2019-11-23 20:33:14,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:33:14,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:33:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:14,294 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 8 states. [2019-11-23 20:33:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:14,336 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-23 20:33:14,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:33:14,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-23 20:33:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:14,337 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:33:14,338 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:33:14,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:33:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 20:33:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:33:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-11-23 20:33:14,348 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2019-11-23 20:33:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:14,348 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-11-23 20:33:14,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:33:14,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-11-23 20:33:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:33:14,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:14,350 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:14,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:14,557 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash -732659676, now seen corresponding path program 5 times [2019-11-23 20:33:14,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:14,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715554377] [2019-11-23 20:33:14,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:33:14,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715554377] [2019-11-23 20:33:14,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949649217] [2019-11-23 20:33:14,644 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 20:33:14,710 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:33:14,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:14,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:14,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:33:14,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:14,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:33:14,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933085156] [2019-11-23 20:33:14,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:14,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:14,756 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 11 states. [2019-11-23 20:33:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:14,906 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2019-11-23 20:33:14,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:33:14,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-23 20:33:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:14,911 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:33:14,911 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:33:14,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:33:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-23 20:33:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:33:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-23 20:33:14,920 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-11-23 20:33:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:14,921 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-23 20:33:14,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-23 20:33:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:33:14,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:14,925 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:15,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:15,136 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1766872509, now seen corresponding path program 6 times [2019-11-23 20:33:15,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:15,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539758902] [2019-11-23 20:33:15,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:33:15,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539758902] [2019-11-23 20:33:15,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58723323] [2019-11-23 20:33:15,266 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 20:33:15,355 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:33:15,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:15,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:33:15,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:33:15,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:15,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:33:15,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482705128] [2019-11-23 20:33:15,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:33:15,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:33:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:33:15,424 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 13 states. [2019-11-23 20:33:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:15,628 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-23 20:33:15,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:33:15,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-23 20:33:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:15,629 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:33:15,630 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:33:15,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:33:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:33:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:33:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-11-23 20:33:15,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 29 [2019-11-23 20:33:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:15,641 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-11-23 20:33:15,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:33:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-11-23 20:33:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:33:15,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:15,644 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:15,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:15,849 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1777131320, now seen corresponding path program 7 times [2019-11-23 20:33:15,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:15,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035711397] [2019-11-23 20:33:15,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:33:15,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035711397] [2019-11-23 20:33:15,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735462531] [2019-11-23 20:33:15,989 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 20:33:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:16,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:16,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:33:16,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:16,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:33:16,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889567529] [2019-11-23 20:33:16,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:16,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:16,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:16,066 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2019-11-23 20:33:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:16,109 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2019-11-23 20:33:16,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:33:16,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-11-23 20:33:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:16,110 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:33:16,110 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:33:16,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:33:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-23 20:33:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:33:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-11-23 20:33:16,119 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2019-11-23 20:33:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:16,120 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-11-23 20:33:16,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-11-23 20:33:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:33:16,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:16,122 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:16,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:16,327 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1581167946, now seen corresponding path program 8 times [2019-11-23 20:33:16,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:16,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401198061] [2019-11-23 20:33:16,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:33:16,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401198061] [2019-11-23 20:33:16,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992865884] [2019-11-23 20:33:16,449 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 20:33:16,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:16,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:16,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:33:16,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:33:16,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:16,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:33:16,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778618969] [2019-11-23 20:33:16,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:33:16,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:33:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:16,527 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2019-11-23 20:33:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:16,560 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-23 20:33:16,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:33:16,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-23 20:33:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:16,562 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:33:16,562 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:33:16,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:33:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:33:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:33:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2019-11-23 20:33:16,567 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 36 [2019-11-23 20:33:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:16,568 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2019-11-23 20:33:16,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:33:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2019-11-23 20:33:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:33:16,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:16,569 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:16,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:16,770 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -908644020, now seen corresponding path program 9 times [2019-11-23 20:33:16,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:16,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945276464] [2019-11-23 20:33:16,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:33:16,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945276464] [2019-11-23 20:33:16,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252171511] [2019-11-23 20:33:16,911 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 20:33:16,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:33:16,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:16,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:33:16,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:33:17,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:17,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:33:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986910843] [2019-11-23 20:33:17,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:33:17,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:33:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:17,049 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 17 states. [2019-11-23 20:33:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:17,289 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-23 20:33:17,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:33:17,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2019-11-23 20:33:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:17,290 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:33:17,291 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:33:17,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:33:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:33:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-23 20:33:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:33:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-23 20:33:17,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 38 [2019-11-23 20:33:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:17,308 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-23 20:33:17,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:33:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-23 20:33:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:33:17,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:17,309 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:17,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:17,522 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash 732909333, now seen corresponding path program 10 times [2019-11-23 20:33:17,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:17,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371505299] [2019-11-23 20:33:17,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:33:17,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371505299] [2019-11-23 20:33:17,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569358445] [2019-11-23 20:33:17,629 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 20:33:17,687 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:17,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:17,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:33:17,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:33:17,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:17,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:33:17,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612325758] [2019-11-23 20:33:17,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:33:17,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:33:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:33:17,720 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 14 states. [2019-11-23 20:33:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:17,763 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2019-11-23 20:33:17,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:33:17,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2019-11-23 20:33:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:17,764 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:33:17,764 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:33:17,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:33:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:33:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 20:33:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:33:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-23 20:33:17,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 43 [2019-11-23 20:33:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:17,770 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-23 20:33:17,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:33:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-23 20:33:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:33:17,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:17,771 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:17,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:17,976 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -426398509, now seen corresponding path program 11 times [2019-11-23 20:33:17,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:17,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181655970] [2019-11-23 20:33:17,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:33:18,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181655970] [2019-11-23 20:33:18,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567754078] [2019-11-23 20:33:18,104 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 20:33:18,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:33:18,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:18,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:33:18,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:33:18,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:18,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:33:18,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537859689] [2019-11-23 20:33:18,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:33:18,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:33:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:18,519 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 15 states. [2019-11-23 20:33:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:18,576 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-23 20:33:18,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:33:18,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2019-11-23 20:33:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:18,580 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:33:18,581 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:33:18,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:33:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:33:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:33:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-23 20:33:18,591 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 45 [2019-11-23 20:33:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:18,592 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-23 20:33:18,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:33:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-23 20:33:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:33:18,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:18,593 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:18,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:18,795 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2124705007, now seen corresponding path program 12 times [2019-11-23 20:33:18,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:18,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443999484] [2019-11-23 20:33:18,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:33:18,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443999484] [2019-11-23 20:33:18,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509262588] [2019-11-23 20:33:18,941 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 20:33:19,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:33:19,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:19,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:33:19,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:33:19,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:19,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-23 20:33:19,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844768471] [2019-11-23 20:33:19,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:33:19,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:19,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:33:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:19,252 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 21 states. [2019-11-23 20:33:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:19,571 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2019-11-23 20:33:19,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:33:19,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-11-23 20:33:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:19,573 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:33:19,573 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:33:19,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:33:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:33:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-11-23 20:33:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:33:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-23 20:33:19,578 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2019-11-23 20:33:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:19,578 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-23 20:33:19,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:33:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-23 20:33:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:33:19,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:19,579 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:19,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:19,784 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -819693964, now seen corresponding path program 13 times [2019-11-23 20:33:19,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:19,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868083081] [2019-11-23 20:33:19,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:33:19,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868083081] [2019-11-23 20:33:19,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589091145] [2019-11-23 20:33:19,931 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 20:33:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:19,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:33:19,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:33:20,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:20,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:33:20,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662590591] [2019-11-23 20:33:20,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:33:20,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:33:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:20,022 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 17 states. [2019-11-23 20:33:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,092 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-11-23 20:33:20,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:33:20,092 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-11-23 20:33:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,093 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:33:20,093 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:33:20,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:33:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:33:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:33:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-23 20:33:20,098 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 52 [2019-11-23 20:33:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,098 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-23 20:33:20,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:33:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-23 20:33:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:33:20,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,099 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:20,303 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash -208097674, now seen corresponding path program 14 times [2019-11-23 20:33:20,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576894880] [2019-11-23 20:33:20,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:33:20,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576894880] [2019-11-23 20:33:20,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409517249] [2019-11-23 20:33:20,483 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 20:33:20,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:20,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:20,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:33:20,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:33:20,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:20,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:33:20,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398844558] [2019-11-23 20:33:20,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:33:20,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:33:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:33:20,556 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 18 states. [2019-11-23 20:33:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,615 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2019-11-23 20:33:20,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:33:20,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-11-23 20:33:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,617 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:33:20,617 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:33:20,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:33:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:33:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:33:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:33:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-11-23 20:33:20,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 54 [2019-11-23 20:33:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,622 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-11-23 20:33:20,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:33:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-11-23 20:33:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:33:20,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,623 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:20,827 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -874582536, now seen corresponding path program 15 times [2019-11-23 20:33:20,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619805438] [2019-11-23 20:33:20,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:33:21,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619805438] [2019-11-23 20:33:21,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244270338] [2019-11-23 20:33:21,037 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 20:33:21,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:33:21,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:21,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:33:21,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:33:21,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:21,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 20:33:21,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004504188] [2019-11-23 20:33:21,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:33:21,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:33:21,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:33:21,304 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 25 states. [2019-11-23 20:33:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:21,667 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2019-11-23 20:33:21,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:33:21,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2019-11-23 20:33:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:21,668 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:33:21,668 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:33:21,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=588, Invalid=1052, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:33:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:33:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-11-23 20:33:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:33:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2019-11-23 20:33:21,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2019-11-23 20:33:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:21,673 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2019-11-23 20:33:21,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:33:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2019-11-23 20:33:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:33:21,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:21,674 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:21,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:21,887 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2131972247, now seen corresponding path program 16 times [2019-11-23 20:33:21,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:21,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987521603] [2019-11-23 20:33:21,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:33:22,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987521603] [2019-11-23 20:33:22,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32843348] [2019-11-23 20:33:22,089 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 20:33:22,192 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:22,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:22,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:33:22,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:33:22,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:22,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:33:22,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418684769] [2019-11-23 20:33:22,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:33:22,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:22,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:33:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:22,223 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 20 states. [2019-11-23 20:33:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:22,287 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2019-11-23 20:33:22,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:33:22,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2019-11-23 20:33:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:22,289 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:33:22,289 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:33:22,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:33:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-23 20:33:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:33:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2019-11-23 20:33:22,293 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 61 [2019-11-23 20:33:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:22,293 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2019-11-23 20:33:22,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:33:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2019-11-23 20:33:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:33:22,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:22,294 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:22,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:22,498 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:22,499 INFO L82 PathProgramCache]: Analyzing trace with hash 407525799, now seen corresponding path program 17 times [2019-11-23 20:33:22,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:22,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514518365] [2019-11-23 20:33:22,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:33:22,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514518365] [2019-11-23 20:33:22,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012141167] [2019-11-23 20:33:22,707 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 20:33:23,655 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:33:23,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:23,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:33:23,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:33:23,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:23,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:33:23,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910414199] [2019-11-23 20:33:23,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:33:23,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:33:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:23,678 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 21 states. [2019-11-23 20:33:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:23,756 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-11-23 20:33:23,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:33:23,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2019-11-23 20:33:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:23,757 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:33:23,757 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:33:23,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:33:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 20:33:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:33:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2019-11-23 20:33:23,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 63 [2019-11-23 20:33:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:23,762 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2019-11-23 20:33:23,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:33:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2019-11-23 20:33:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:33:23,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:23,763 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:23,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:23,967 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1323723877, now seen corresponding path program 18 times [2019-11-23 20:33:23,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:23,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223643555] [2019-11-23 20:33:23,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:33:24,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223643555] [2019-11-23 20:33:24,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989083041] [2019-11-23 20:33:24,181 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 20:33:25,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:33:25,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:25,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:25,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:33:25,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:25,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2019-11-23 20:33:25,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944381243] [2019-11-23 20:33:25,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:33:25,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:33:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:33:25,893 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 29 states. [2019-11-23 20:33:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:26,353 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2019-11-23 20:33:26,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:33:26,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2019-11-23 20:33:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:26,354 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:33:26,354 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:33:26,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=805, Invalid=1451, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:33:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:33:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-11-23 20:33:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:33:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2019-11-23 20:33:26,360 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 65 [2019-11-23 20:33:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:26,360 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2019-11-23 20:33:26,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:33:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2019-11-23 20:33:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:33:26,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:26,361 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:26,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:26,565 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1236717600, now seen corresponding path program 19 times [2019-11-23 20:33:26,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:26,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908989988] [2019-11-23 20:33:26,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:33:26,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908989988] [2019-11-23 20:33:26,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379302404] [2019-11-23 20:33:26,805 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 20:33:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:26,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:33:26,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:33:26,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:26,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:33:26,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160040160] [2019-11-23 20:33:26,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:33:26,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:26,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:33:26,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:26,887 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 23 states. [2019-11-23 20:33:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:26,947 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2019-11-23 20:33:26,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:33:26,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2019-11-23 20:33:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:26,950 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:33:26,950 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:33:26,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:33:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:33:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:33:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-11-23 20:33:26,955 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 70 [2019-11-23 20:33:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:26,955 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-11-23 20:33:26,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:33:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-11-23 20:33:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:33:26,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:26,956 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:27,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:27,163 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1713255518, now seen corresponding path program 20 times [2019-11-23 20:33:27,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:27,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316515483] [2019-11-23 20:33:27,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:33:27,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316515483] [2019-11-23 20:33:27,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362650023] [2019-11-23 20:33:27,437 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 20:33:27,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:27,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:27,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:33:27,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:33:27,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:27,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:33:27,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509529599] [2019-11-23 20:33:27,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:33:27,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:33:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:33:27,544 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 24 states. [2019-11-23 20:33:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:27,619 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2019-11-23 20:33:27,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:33:27,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2019-11-23 20:33:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:27,620 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:33:27,620 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:33:27,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:33:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:33:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:33:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:33:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2019-11-23 20:33:27,624 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 72 [2019-11-23 20:33:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:27,624 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2019-11-23 20:33:27,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:33:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2019-11-23 20:33:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:33:27,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:27,625 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:27,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:27,829 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1959006556, now seen corresponding path program 21 times [2019-11-23 20:33:27,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:27,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497940501] [2019-11-23 20:33:27,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:33:28,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497940501] [2019-11-23 20:33:28,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443154167] [2019-11-23 20:33:28,091 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 20:33:28,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:33:28,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:28,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:33:28,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:33:28,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:28,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2019-11-23 20:33:28,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652578917] [2019-11-23 20:33:28,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:33:28,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:33:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:33:28,666 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 33 states. [2019-11-23 20:33:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:29,183 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2019-11-23 20:33:29,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:33:29,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2019-11-23 20:33:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:29,191 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:33:29,191 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:33:29,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1056, Invalid=1914, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:33:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:33:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2019-11-23 20:33:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:33:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2019-11-23 20:33:29,196 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 74 [2019-11-23 20:33:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:29,197 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2019-11-23 20:33:29,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:33:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2019-11-23 20:33:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:33:29,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:29,198 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:29,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:29,403 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2047617981, now seen corresponding path program 22 times [2019-11-23 20:33:29,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:29,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910054591] [2019-11-23 20:33:29,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:33:29,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910054591] [2019-11-23 20:33:29,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363756020] [2019-11-23 20:33:29,668 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 20:33:29,816 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:29,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:29,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:33:29,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:33:29,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:29,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:33:29,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647543074] [2019-11-23 20:33:29,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:33:29,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:29,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:33:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:33:29,854 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 26 states. [2019-11-23 20:33:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:29,957 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2019-11-23 20:33:29,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:33:29,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2019-11-23 20:33:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:29,961 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:33:29,961 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:33:29,962 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:33:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:33:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-23 20:33:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:33:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2019-11-23 20:33:29,968 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 79 [2019-11-23 20:33:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:29,969 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2019-11-23 20:33:29,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:33:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2019-11-23 20:33:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:33:29,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:29,971 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:30,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:30,181 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -933821829, now seen corresponding path program 23 times [2019-11-23 20:33:30,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:30,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310686504] [2019-11-23 20:33:30,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:33:30,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310686504] [2019-11-23 20:33:30,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419926518] [2019-11-23 20:33:30,511 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 20:33:36,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:33:36,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:36,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:33:36,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:33:36,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:36,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12] total 36 [2019-11-23 20:33:36,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221947719] [2019-11-23 20:33:36,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:33:36,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:36,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:33:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=870, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:33:36,276 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 36 states. [2019-11-23 20:33:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:36,891 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2019-11-23 20:33:36,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:33:36,891 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2019-11-23 20:33:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:36,893 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:33:36,893 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:33:36,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1254, Invalid=2286, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:33:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:33:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-11-23 20:33:36,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:33:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2019-11-23 20:33:36,899 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 81 [2019-11-23 20:33:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:36,899 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2019-11-23 20:33:36,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:33:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2019-11-23 20:33:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:33:36,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:36,900 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:37,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:37,105 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1500264010, now seen corresponding path program 24 times [2019-11-23 20:33:37,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:37,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174774254] [2019-11-23 20:33:37,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:33:37,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174774254] [2019-11-23 20:33:37,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153162077] [2019-11-23 20:33:37,473 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 20:33:45,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:33:45,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:45,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:33:45,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:33:46,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:46,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2019-11-23 20:33:46,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922789066] [2019-11-23 20:33:46,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:33:46,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:33:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:33:46,117 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 38 states. [2019-11-23 20:33:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:46,786 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2019-11-23 20:33:46,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:33:46,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2019-11-23 20:33:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:46,788 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:33:46,788 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:33:46,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=2528, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:33:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:33:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-11-23 20:33:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:33:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2019-11-23 20:33:46,792 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 86 [2019-11-23 20:33:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:46,792 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2019-11-23 20:33:46,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:33:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2019-11-23 20:33:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:33:46,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:46,793 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:47,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:47,001 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1937018199, now seen corresponding path program 25 times [2019-11-23 20:33:47,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:47,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260433028] [2019-11-23 20:33:47,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:33:47,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260433028] [2019-11-23 20:33:47,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225018209] [2019-11-23 20:33:47,421 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 20:33:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:47,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:33:47,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:33:47,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:47,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:33:47,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272218744] [2019-11-23 20:33:47,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:33:47,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:33:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:33:47,554 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 29 states. [2019-11-23 20:33:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:47,659 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2019-11-23 20:33:47,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:33:47,660 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 91 [2019-11-23 20:33:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:47,661 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:33:47,661 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:33:47,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:33:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:33:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 20:33:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 20:33:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2019-11-23 20:33:47,665 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 91 [2019-11-23 20:33:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:47,665 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2019-11-23 20:33:47,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:33:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2019-11-23 20:33:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:33:47,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:47,666 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:47,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:47,870 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash 795686677, now seen corresponding path program 26 times [2019-11-23 20:33:47,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:47,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602834111] [2019-11-23 20:33:47,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:33:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602834111] [2019-11-23 20:33:48,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755936820] [2019-11-23 20:33:48,254 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 20:33:48,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:48,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:48,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:33:48,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:33:48,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:48,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:33:48,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538778208] [2019-11-23 20:33:48,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:33:48,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:33:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:33:48,357 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 30 states. [2019-11-23 20:33:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:48,457 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2019-11-23 20:33:48,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:33:48,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2019-11-23 20:33:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:48,458 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:33:48,459 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:33:48,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:33:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:33:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-23 20:33:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:33:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2019-11-23 20:33:48,463 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 93 [2019-11-23 20:33:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:48,464 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2019-11-23 20:33:48,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:33:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2019-11-23 20:33:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:33:48,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:48,465 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:48,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:48,669 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -807245485, now seen corresponding path program 27 times [2019-11-23 20:33:48,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:48,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612747790] [2019-11-23 20:33:48,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:33:49,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612747790] [2019-11-23 20:33:49,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993260541] [2019-11-23 20:33:49,150 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 20:33:50,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:33:50,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:50,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:33:50,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:33:50,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:50,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14] total 42 [2019-11-23 20:33:50,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161990648] [2019-11-23 20:33:50,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:33:50,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:33:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1197, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:33:50,973 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 42 states. [2019-11-23 20:33:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:51,802 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2019-11-23 20:33:51,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:33:51,803 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 95 [2019-11-23 20:33:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:51,804 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:33:51,805 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:33:51,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1701, Invalid=3129, Unknown=0, NotChecked=0, Total=4830 [2019-11-23 20:33:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:33:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-11-23 20:33:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:33:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2019-11-23 20:33:51,811 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 95 [2019-11-23 20:33:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:51,811 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2019-11-23 20:33:51,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:33:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2019-11-23 20:33:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 20:33:51,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:51,812 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:52,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:52,017 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash -331082510, now seen corresponding path program 28 times [2019-11-23 20:33:52,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:52,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862591510] [2019-11-23 20:33:52,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:33:52,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862591510] [2019-11-23 20:33:52,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850987049] [2019-11-23 20:33:52,578 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 20:33:53,023 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:53,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:53,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:33:53,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:33:53,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:53,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:33:53,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29188542] [2019-11-23 20:33:53,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:33:53,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:33:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:33:53,055 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 32 states. [2019-11-23 20:33:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:53,167 INFO L93 Difference]: Finished difference Result 164 states and 194 transitions. [2019-11-23 20:33:53,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:33:53,168 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2019-11-23 20:33:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:53,169 INFO L225 Difference]: With dead ends: 164 [2019-11-23 20:33:53,169 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:33:53,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:33:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:33:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-23 20:33:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:33:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2019-11-23 20:33:53,176 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 100 [2019-11-23 20:33:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:53,176 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2019-11-23 20:33:53,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:33:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2019-11-23 20:33:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:33:53,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:53,178 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:53,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:53,381 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:53,382 INFO L82 PathProgramCache]: Analyzing trace with hash -243564300, now seen corresponding path program 29 times [2019-11-23 20:33:53,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:53,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463241428] [2019-11-23 20:33:53,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:33:53,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463241428] [2019-11-23 20:33:53,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097500331] [2019-11-23 20:33:53,964 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true