/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/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:40,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:40,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:40,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:40,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:40,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:40,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:40,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:40,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:40,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:40,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:40,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:40,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:40,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:40,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:40,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:40,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:40,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:40,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:40,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:40,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:40,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:40,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:40,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:40,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:40,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:18:40,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:18:40,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:18:40,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:18:40,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:18:40,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:18:40,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:18:40,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:18:40,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:40,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:40,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:40,103 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 20:18:40,121 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:40,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:40,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:40,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:40,123 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:40,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:40,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:40,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:40,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:40,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:40,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:40,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:40,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:40,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:40,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:40,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:40,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:40,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:40,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:40,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:40,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:40,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:40,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:40,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:40,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:40,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:40,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:40,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:40,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:40,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:40,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:40,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:40,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:40,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:40,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:40,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-23 20:18:40,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25918ef1a/5b6d8f54b6fa4db7b4fcdc3edfadb0d0/FLAGda7de185c [2019-11-23 20:18:40,973 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:40,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-23 20:18:40,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25918ef1a/5b6d8f54b6fa4db7b4fcdc3edfadb0d0/FLAGda7de185c [2019-11-23 20:18:41,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25918ef1a/5b6d8f54b6fa4db7b4fcdc3edfadb0d0 [2019-11-23 20:18:41,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:41,382 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:41,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:41,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:41,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:41,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbab73b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41, skipping insertion in model container [2019-11-23 20:18:41,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:41,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:41,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:41,602 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:41,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:41,642 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:41,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41 WrapperNode [2019-11-23 20:18:41,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:41,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:41,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:41,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:41,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:41,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:41,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:41,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:41,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (1/1) ... [2019-11-23 20:18:41,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:41,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:41,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:41,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:41,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (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 20:18:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:41,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:41,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:41,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:42,094 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:42,094 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:18:42,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:42 BoogieIcfgContainer [2019-11-23 20:18:42,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:42,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:42,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:42,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:42,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:41" (1/3) ... [2019-11-23 20:18:42,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a17af40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:42, skipping insertion in model container [2019-11-23 20:18:42,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:41" (2/3) ... [2019-11-23 20:18:42,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a17af40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:42, skipping insertion in model container [2019-11-23 20:18:42,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:42" (3/3) ... [2019-11-23 20:18:42,104 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2019-11-23 20:18:42,114 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:42,121 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:18:42,143 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:18:42,193 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:42,194 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:42,194 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:42,194 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:42,194 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:42,194 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:42,194 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:42,195 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:18:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:42,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,233 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:42,234 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2019-11-23 20:18:42,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:42,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367371760] [2019-11-23 20:18:42,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,363 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 20:18:42,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367371760] [2019-11-23 20:18:42,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:42,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:18:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906536619] [2019-11-23 20:18:42,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:18:42,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:18:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:18:42,390 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-23 20:18:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,412 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2019-11-23 20:18:42,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:18:42,414 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:18:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,425 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:18:42,426 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:18:42,429 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 20:18:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:18:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:18:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:18:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:18:42,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2019-11-23 20:18:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,476 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:18:42,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:18:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:18:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:42,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,479 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:42,480 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1935441171, now seen corresponding path program 1 times [2019-11-23 20:18:42,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:42,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187714945] [2019-11-23 20:18:42,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,588 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 20:18:42,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187714945] [2019-11-23 20:18:42,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:42,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:42,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705422618] [2019-11-23 20:18:42,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:42,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:42,594 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 3 states. [2019-11-23 20:18:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,649 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-23 20:18:42,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:42,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:18:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,651 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:18:42,651 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:18:42,652 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 20:18:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:18:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:18:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:18:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-23 20:18:42,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2019-11-23 20:18:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,658 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-23 20:18:42,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-23 20:18:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:18:42,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:42,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1367518219, now seen corresponding path program 1 times [2019-11-23 20:18:42,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:42,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031107084] [2019-11-23 20:18:42,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:42,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031107084] [2019-11-23 20:18:42,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190363221] [2019-11-23 20:18:42,765 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 20:18:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:42,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:42,877 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 20:18:42,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:18:42,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 20:18:42,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042925147] [2019-11-23 20:18:42,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:42,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:42,885 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-23 20:18:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,923 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-11-23 20:18:42,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:42,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:18:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,926 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:18:42,926 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:18:42,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:18:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:18:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:18:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:18:42,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-11-23 20:18:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,935 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:18:42,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:18:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:18:42,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,937 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2093661559, now seen corresponding path program 1 times [2019-11-23 20:18:43,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924836581] [2019-11-23 20:18:43,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,248 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 20:18:43,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924836581] [2019-11-23 20:18:43,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165574613] [2019-11-23 20:18:43,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:43,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:43,357 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 20:18:43,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:43,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:18:43,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260568802] [2019-11-23 20:18:43,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:18:43,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:18:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:43,362 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2019-11-23 20:18:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:43,530 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-11-23 20:18:43,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:43,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-23 20:18:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:43,533 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:18:43,534 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:18:43,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:18:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2019-11-23 20:18:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:18:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-23 20:18:43,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2019-11-23 20:18:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:43,551 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-23 20:18:43,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:18:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-23 20:18:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:18:43,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:43,552 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,760 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1525876983, now seen corresponding path program 2 times [2019-11-23 20:18:43,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150559768] [2019-11-23 20:18:43,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:18:43,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150559768] [2019-11-23 20:18:43,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:43,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:43,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968042356] [2019-11-23 20:18:43,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:43,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:43,826 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 3 states. [2019-11-23 20:18:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:43,841 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:18:43,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:43,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:18:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:43,842 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:18:43,842 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:18:43,843 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 20:18:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:18:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 20:18:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:18:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-23 20:18:43,849 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2019-11-23 20:18:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:43,850 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-23 20:18:43,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-23 20:18:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:18:43,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:43,851 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,851 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1784042421, now seen corresponding path program 1 times [2019-11-23 20:18:43,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445567732] [2019-11-23 20:18:43,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:43,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445567732] [2019-11-23 20:18:43,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100934286] [2019-11-23 20:18:43,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:43,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:44,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 20:18:44,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217115247] [2019-11-23 20:18:44,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:44,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:44,041 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2019-11-23 20:18:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:44,114 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-23 20:18:44,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:18:44,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:18:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:44,115 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:18:44,115 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:18:44,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:18:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:18:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:18:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-23 20:18:44,122 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2019-11-23 20:18:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:44,123 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-23 20:18:44,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-23 20:18:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:18:44,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:44,124 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:44,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:44,327 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1999213555, now seen corresponding path program 2 times [2019-11-23 20:18:44,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:44,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143971909] [2019-11-23 20:18:44,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:44,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143971909] [2019-11-23 20:18:44,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230915409] [2019-11-23 20:18:44,409 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 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 20:18:44,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:44,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:44,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:18:44,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168788197] [2019-11-23 20:18:44,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:44,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:44,507 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2019-11-23 20:18:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:44,573 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-11-23 20:18:44,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:18:44,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-23 20:18:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:44,574 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:18:44,574 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:18:44,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:18:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 20:18:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:18:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-23 20:18:44,581 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2019-11-23 20:18:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:44,581 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-23 20:18:44,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-23 20:18:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:18:44,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:44,582 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:44,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:44,786 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1674724175, now seen corresponding path program 3 times [2019-11-23 20:18:44,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:44,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364785484] [2019-11-23 20:18:44,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:44,862 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 20:18:44,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364785484] [2019-11-23 20:18:44,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174947585] [2019-11-23 20:18:44,863 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 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 20:18:44,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:44,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:18:44,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:44,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:18:44,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046564260] [2019-11-23 20:18:44,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:44,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:44,947 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2019-11-23 20:18:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:45,218 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2019-11-23 20:18:45,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:18:45,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:18:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:45,221 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:18:45,221 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:18:45,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:18:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2019-11-23 20:18:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:18:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2019-11-23 20:18:45,236 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 25 [2019-11-23 20:18:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:45,236 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2019-11-23 20:18:45,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2019-11-23 20:18:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:18:45,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:45,240 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:45,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:45,444 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:45,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1429948289, now seen corresponding path program 4 times [2019-11-23 20:18:45,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:45,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615474504] [2019-11-23 20:18:45,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:45,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615474504] [2019-11-23 20:18:45,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299623108] [2019-11-23 20:18:45,530 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 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 20:18:45,573 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:45,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:45,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:18:45,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:45,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:18:45,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:45,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-23 20:18:45,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037389250] [2019-11-23 20:18:45,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:18:45,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:18:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:45,677 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 14 states. [2019-11-23 20:18:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:45,977 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-11-23 20:18:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:18:45,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-11-23 20:18:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:45,978 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:18:45,978 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:18:45,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:18:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2019-11-23 20:18:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:18:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-11-23 20:18:45,987 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 30 [2019-11-23 20:18:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:45,987 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-11-23 20:18:45,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:18:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-11-23 20:18:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:18:45,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:45,989 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:46,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:46,193 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash 17339129, now seen corresponding path program 1 times [2019-11-23 20:18:46,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:46,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115992309] [2019-11-23 20:18:46,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:18:46,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115992309] [2019-11-23 20:18:46,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918051483] [2019-11-23 20:18:46,293 INFO L94 rtionOrderModulation]: Keeping assertion order 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 20:18:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:46,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:46,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:18:46,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:46,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 20:18:46,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41135228] [2019-11-23 20:18:46,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:46,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:46,463 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 16 states. [2019-11-23 20:18:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:46,721 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2019-11-23 20:18:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:18:46,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-11-23 20:18:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:46,723 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:18:46,723 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 20:18:46,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:18:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 20:18:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2019-11-23 20:18:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:18:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-11-23 20:18:46,733 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 34 [2019-11-23 20:18:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:46,733 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-11-23 20:18:46,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-11-23 20:18:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:18:46,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:46,737 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:46,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:46,938 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 898815777, now seen corresponding path program 1 times [2019-11-23 20:18:46,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:46,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183319421] [2019-11-23 20:18:46,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:47,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183319421] [2019-11-23 20:18:47,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074542711] [2019-11-23 20:18:47,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:47,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:47,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:47,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-23 20:18:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189407670] [2019-11-23 20:18:47,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:18:47,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:18:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:47,192 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 18 states. [2019-11-23 20:18:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:47,296 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2019-11-23 20:18:47,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:18:47,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2019-11-23 20:18:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:47,297 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:18:47,297 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:18:47,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:18:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-23 20:18:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:18:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2019-11-23 20:18:47,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 36 [2019-11-23 20:18:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:47,313 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2019-11-23 20:18:47,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:18:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2019-11-23 20:18:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:18:47,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:47,316 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:47,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:47,520 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1590996189, now seen corresponding path program 2 times [2019-11-23 20:18:47,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:47,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707000730] [2019-11-23 20:18:47,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:47,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707000730] [2019-11-23 20:18:47,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909475911] [2019-11-23 20:18:47,642 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 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 20:18:47,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:47,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:47,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:18:47,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:47,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:47,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-23 20:18:47,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353918360] [2019-11-23 20:18:47,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:18:47,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:18:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:18:47,820 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 20 states. [2019-11-23 20:18:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:47,946 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2019-11-23 20:18:47,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:47,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-11-23 20:18:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:47,947 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:18:47,947 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:18:47,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:18:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:18:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-11-23 20:18:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:18:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2019-11-23 20:18:47,954 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 38 [2019-11-23 20:18:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:47,955 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2019-11-23 20:18:47,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:18:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2019-11-23 20:18:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:47,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:47,956 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:48,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:48,159 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2003511643, now seen corresponding path program 3 times [2019-11-23 20:18:48,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:48,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510296848] [2019-11-23 20:18:48,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:48,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510296848] [2019-11-23 20:18:48,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484855112] [2019-11-23 20:18:48,301 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 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 20:18:48,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:48,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:48,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:18:48,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:48,541 INFO L343 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2019-11-23 20:18:48,542 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 59 [2019-11-23 20:18:48,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:48,544 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:18:48,574 INFO L567 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2019-11-23 20:18:48,575 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:18:48,575 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:43 [2019-11-23 20:18:48,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:54,726 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 34 [2019-11-23 20:18:54,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:00,763 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-23 20:19:02,826 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2019-11-23 20:19:02,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:19:02,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:02,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-23 20:19:02,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580331050] [2019-11-23 20:19:02,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:19:02,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:19:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=353, Unknown=4, NotChecked=0, Total=462 [2019-11-23 20:19:02,879 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 22 states.