/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:52,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:52,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:52,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:52,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:52,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:52,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:52,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:52,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:52,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:52,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:52,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:52,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:52,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:52,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:52,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:52,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:52,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:52,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:52,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:52,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:52,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:52,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:52,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:52,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:52,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:52,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:52,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:52,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:52,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:52,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:52,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:52,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:52,402 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:52,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:52,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:52,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:52,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:52,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:52,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:52,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:52,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:52,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:52,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:52,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:52,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:52,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:52,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:52,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:52,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:52,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:52,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:52,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:52,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:52,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:52,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:52,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:52,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:52,876 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:52,877 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:52,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2021-01-06 10:28:52,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e3dcee657/0ada1c45e29d48dbb0226fba5cefb000/FLAG4eb065d39 [2021-01-06 10:28:53,731 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:53,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2021-01-06 10:28:53,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e3dcee657/0ada1c45e29d48dbb0226fba5cefb000/FLAG4eb065d39 [2021-01-06 10:28:54,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e3dcee657/0ada1c45e29d48dbb0226fba5cefb000 [2021-01-06 10:28:54,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:54,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:54,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:54,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:54,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:54,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2fbfae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54, skipping insertion in model container [2021-01-06 10:28:54,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:54,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:54,302 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:54,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:54,335 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:54,351 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:54,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:54,378 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:54,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54 WrapperNode [2021-01-06 10:28:54,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:54,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:54,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:54,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:54,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:54,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:54,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:54,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:54,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... [2021-01-06 10:28:54,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:54,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:54,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:54,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:54,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:55,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:55,042 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:28:55,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:55 BoogieIcfgContainer [2021-01-06 10:28:55,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:55,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:55,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:55,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:55,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:54" (1/3) ... [2021-01-06 10:28:55,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c05ecf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:55, skipping insertion in model container [2021-01-06 10:28:55,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:54" (2/3) ... [2021-01-06 10:28:55,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c05ecf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:55, skipping insertion in model container [2021-01-06 10:28:55,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:55" (3/3) ... [2021-01-06 10:28:55,056 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2021-01-06 10:28:55,065 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:55,071 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:55,159 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:55,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:55,208 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:55,208 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:55,208 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:55,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:55,208 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:55,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:55,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:28:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:55,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:55,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-01-06 10:28:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571223148] [2021-01-06 10:28:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:55,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571223148] [2021-01-06 10:28:55,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:55,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:55,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469725718] [2021-01-06 10:28:55,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:55,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:55,464 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:28:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:55,483 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:28:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:55,485 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:28:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:55,496 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:28:55,496 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:28:55,500 INFO L677 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 [2021-01-06 10:28:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:28:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:28:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:28:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:28:55,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-01-06 10:28:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:55,541 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:28:55,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:28:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:55,542 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:55,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:55,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-01-06 10:28:55,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672628026] [2021-01-06 10:28:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:55,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672628026] [2021-01-06 10:28:55,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:55,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:55,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048968632] [2021-01-06 10:28:55,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:55,669 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2021-01-06 10:28:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:55,760 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-01-06 10:28:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:55,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 10:28:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:55,762 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:28:55,762 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:28:55,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:28:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-01-06 10:28:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:28:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 10:28:55,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 10:28:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:55,769 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 10:28:55,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 10:28:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:28:55,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:55,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:55,771 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-01-06 10:28:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299369567] [2021-01-06 10:28:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:55,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299369567] [2021-01-06 10:28:55,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641547226] [2021-01-06 10:28:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:28:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534790835] [2021-01-06 10:28:56,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:56,074 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2021-01-06 10:28:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:56,178 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:28:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:56,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:28:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:56,180 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:28:56,181 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:56,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:28:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 10:28:56,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 10:28:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:56,189 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 10:28:56,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 10:28:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:56,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:56,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:56,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:56,405 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-01-06 10:28:56,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:56,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751178521] [2021-01-06 10:28:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751178521] [2021-01-06 10:28:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409682404] [2021-01-06 10:28:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:56,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:28:56,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:56,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:56,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:28:56,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:28:56,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:56,835 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:28:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:56,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:56,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:28:56,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293345724] [2021-01-06 10:28:56,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:56,863 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 10:28:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:57,053 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:28:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:57,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:28:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:57,055 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:28:57,056 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:57,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:28:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 10:28:57,064 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-01-06 10:28:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:57,064 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 10:28:57,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 10:28:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:57,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:57,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:57,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:57,280 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-01-06 10:28:57,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:57,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191136789] [2021-01-06 10:28:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:57,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191136789] [2021-01-06 10:28:57,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297569258] [2021-01-06 10:28:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:57,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:57,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:57,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:28:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398234747] [2021-01-06 10:28:57,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:57,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:57,667 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2021-01-06 10:28:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:57,864 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-01-06 10:28:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:57,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:28:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:57,866 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:28:57,867 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:28:57,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:28:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-01-06 10:28:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:28:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:28:57,876 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-01-06 10:28:57,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:57,877 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:28:57,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:28:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:28:57,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:57,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:58,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:58,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-01-06 10:28:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:58,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324519083] [2021-01-06 10:28:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:58,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324519083] [2021-01-06 10:28:58,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226831852] [2021-01-06 10:28:58,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:58,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:58,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:58,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:28:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45835386] [2021-01-06 10:28:58,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:58,497 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2021-01-06 10:28:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:58,692 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-01-06 10:28:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:58,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 10:28:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:58,696 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:28:58,696 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:28:58,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:28:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-01-06 10:28:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:28:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 10:28:58,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-01-06 10:28:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:58,709 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 10:28:58,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 10:28:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:28:58,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:58,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:58,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:58,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:58,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-01-06 10:28:58,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:58,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271015148] [2021-01-06 10:28:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:59,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271015148] [2021-01-06 10:28:59,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714263232] [2021-01-06 10:28:59,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:59,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:59,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:59,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:28:59,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:59,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 10:28:59,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543442471] [2021-01-06 10:28:59,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:59,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:59,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:59,252 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-01-06 10:28:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,321 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 10:28:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:59,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 10:28:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,339 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:59,339 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:59,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-01-06 10:28:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:28:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 10:28:59,357 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-01-06 10:28:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,358 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 10:28:59,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 10:28:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:28:59,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,359 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:59,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:59,573 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-01-06 10:28:59,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:59,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194175265] [2021-01-06 10:28:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:59,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:59,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516427997] [2021-01-06 10:28:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:28:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:59,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194175265] [2021-01-06 10:28:59,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:59,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516427997] [2021-01-06 10:28:59,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:59,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:59,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321205224] [2021-01-06 10:28:59,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:59,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:59,800 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2021-01-06 10:28:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,932 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-01-06 10:28:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:59,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:28:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,934 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:28:59,934 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:28:59,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:28:59,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-01-06 10:28:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:28:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 10:28:59,944 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-01-06 10:28:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,944 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 10:28:59,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 10:28:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:59,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,946 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:00,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:00,162 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-01-06 10:29:00,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:00,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435524355] [2021-01-06 10:29:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:00,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:00,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194134622] [2021-01-06 10:29:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:00,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:29:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:29:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435524355] [2021-01-06 10:29:00,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194134622] [2021-01-06 10:29:00,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:00,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:00,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647853708] [2021-01-06 10:29:00,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:00,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:00,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:00,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:00,407 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2021-01-06 10:29:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:00,566 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-01-06 10:29:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:00,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 10:29:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:00,569 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:29:00,569 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:29:00,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:29:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-01-06 10:29:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:29:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 10:29:00,580 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-01-06 10:29:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:00,580 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 10:29:00,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 10:29:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:29:00,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:00,582 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:00,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:00,796 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:00,797 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-01-06 10:29:00,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:00,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445210284] [2021-01-06 10:29:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:00,814 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:00,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147462515] [2021-01-06 10:29:00,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:29:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:29:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:29:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445210284] [2021-01-06 10:29:00,985 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:00,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147462515] [2021-01-06 10:29:00,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:00,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:29:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857891772] [2021-01-06 10:29:00,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:29:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:29:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:29:00,988 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2021-01-06 10:29:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:01,093 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-01-06 10:29:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:01,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-01-06 10:29:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:01,095 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:29:01,095 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:29:01,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:29:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-01-06 10:29:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:29:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 10:29:01,104 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-01-06 10:29:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:01,105 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 10:29:01,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:29:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 10:29:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:29:01,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:01,106 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:01,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:29:01,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-01-06 10:29:01,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:01,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122260439] [2021-01-06 10:29:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:01,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:01,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740532553] [2021-01-06 10:29:01,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:01,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:29:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:29:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122260439] [2021-01-06 10:29:01,650 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:01,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740532553] [2021-01-06 10:29:01,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:01,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:29:01,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871464823] [2021-01-06 10:29:01,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:01,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:01,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:01,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:01,653 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2021-01-06 10:29:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:01,942 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-01-06 10:29:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:01,943 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:29:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:01,947 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:29:01,947 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:29:01,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:29:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-01-06 10:29:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:29:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:29:01,967 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-01-06 10:29:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:01,968 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:29:01,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:29:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:29:01,970 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:01,970 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:02,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:02,185 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-01-06 10:29:02,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:02,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527288322] [2021-01-06 10:29:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:02,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:02,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194732258] [2021-01-06 10:29:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:02,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:29:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:29:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:29:02,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527288322] [2021-01-06 10:29:02,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:02,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194732258] [2021-01-06 10:29:02,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:02,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:29:02,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511224270] [2021-01-06 10:29:02,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:29:02,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:29:02,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:29:02,700 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2021-01-06 10:29:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:02,925 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-01-06 10:29:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:02,926 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:29:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:02,929 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:29:02,929 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:29:02,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:29:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:29:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-01-06 10:29:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:29:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:29:02,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-01-06 10:29:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:02,953 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:29:02,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:29:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:29:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:29:02,959 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:02,959 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:03,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:03,165 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-01-06 10:29:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:03,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908037132] [2021-01-06 10:29:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:03,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:03,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344776312] [2021-01-06 10:29:03,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:03,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:29:03,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:29:03,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908037132] [2021-01-06 10:29:03,538 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:03,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344776312] [2021-01-06 10:29:03,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:03,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:03,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133609849] [2021-01-06 10:29:03,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:03,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:03,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:03,541 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2021-01-06 10:29:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:03,682 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 10:29:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:29:03,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:29:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:03,684 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:29:03,684 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:29:03,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:29:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:29:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:29:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-01-06 10:29:03,693 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-01-06 10:29:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:03,694 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-01-06 10:29:03,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-01-06 10:29:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:29:03,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:03,695 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:03,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:29:03,900 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-01-06 10:29:03,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:03,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580139278] [2021-01-06 10:29:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:03,923 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:03,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101343046] [2021-01-06 10:29:03,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:29:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580139278] [2021-01-06 10:29:04,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:04,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101343046] [2021-01-06 10:29:04,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:04,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:29:04,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263070979] [2021-01-06 10:29:04,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:29:04,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:29:04,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:04,300 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2021-01-06 10:29:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:04,580 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-01-06 10:29:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:29:04,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2021-01-06 10:29:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:04,583 INFO L225 Difference]: With dead ends: 450 [2021-01-06 10:29:04,584 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 10:29:04,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 10:29:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-01-06 10:29:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:29:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 10:29:04,596 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-01-06 10:29:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:04,597 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 10:29:04,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:29:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 10:29:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:29:04,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:04,598 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:04,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:29:04,812 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-01-06 10:29:04,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:04,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976555949] [2021-01-06 10:29:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:04,832 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:04,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178823822] [2021-01-06 10:29:04,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:04,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:04,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:29:05,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976555949] [2021-01-06 10:29:05,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:05,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178823822] [2021-01-06 10:29:05,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:05,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:29:05,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20911568] [2021-01-06 10:29:05,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:29:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:29:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:05,339 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2021-01-06 10:29:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:05,667 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-01-06 10:29:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:29:05,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2021-01-06 10:29:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:05,671 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:29:05,671 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 10:29:05,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:29:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 10:29:05,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-01-06 10:29:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:29:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 10:29:05,684 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-01-06 10:29:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:05,685 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 10:29:05,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:29:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 10:29:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:29:05,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:05,686 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:05,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:29:05,901 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-01-06 10:29:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:05,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902443419] [2021-01-06 10:29:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:05,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930492285] [2021-01-06 10:29:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:06,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:29:06,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:06,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:29:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:29:06,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902443419] [2021-01-06 10:29:06,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930492285] [2021-01-06 10:29:06,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:06,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:29:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404613819] [2021-01-06 10:29:06,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:29:06,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:29:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:29:06,268 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2021-01-06 10:29:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:06,413 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-06 10:29:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:29:06,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2021-01-06 10:29:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:06,415 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:29:06,415 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:29:06,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:29:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:29:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-01-06 10:29:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:29:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-01-06 10:29:06,424 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-01-06 10:29:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:06,425 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-01-06 10:29:06,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:29:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-01-06 10:29:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:29:06,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:06,426 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:06,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:06,629 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-01-06 10:29:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:06,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260091216] [2021-01-06 10:29:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:06,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:06,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931802774] [2021-01-06 10:29:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:06,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:06,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:29:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:07,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260091216] [2021-01-06 10:29:07,252 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:07,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931802774] [2021-01-06 10:29:07,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:07,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:07,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549944831] [2021-01-06 10:29:07,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:29:07,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:29:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:29:07,254 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2021-01-06 10:29:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:07,998 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-01-06 10:29:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:29:07,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2021-01-06 10:29:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:08,002 INFO L225 Difference]: With dead ends: 580 [2021-01-06 10:29:08,002 INFO L226 Difference]: Without dead ends: 547 [2021-01-06 10:29:08,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:29:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-01-06 10:29:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-01-06 10:29:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:29:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-01-06 10:29:08,031 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-01-06 10:29:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:08,032 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-01-06 10:29:08,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:29:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-01-06 10:29:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:29:08,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:08,033 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:08,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:08,248 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-01-06 10:29:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:08,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17485886] [2021-01-06 10:29:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:08,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:08,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619265663] [2021-01-06 10:29:08,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:09,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:29:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:29:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17485886] [2021-01-06 10:29:09,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619265663] [2021-01-06 10:29:09,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:09,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:09,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748328430] [2021-01-06 10:29:09,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:29:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:09,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:29:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:09,771 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2021-01-06 10:29:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,237 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-01-06 10:29:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:10,238 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 10:29:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,242 INFO L225 Difference]: With dead ends: 757 [2021-01-06 10:29:10,242 INFO L226 Difference]: Without dead ends: 713 [2021-01-06 10:29:10,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-01-06 10:29:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-01-06 10:29:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:29:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-01-06 10:29:10,256 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-01-06 10:29:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,257 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-01-06 10:29:10,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:29:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-01-06 10:29:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:29:10,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,258 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:10,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:10,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-01-06 10:29:10,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:10,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993737022] [2021-01-06 10:29:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:10,485 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:10,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966770375] [2021-01-06 10:29:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:10,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:29:11,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993737022] [2021-01-06 10:29:11,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:11,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966770375] [2021-01-06 10:29:11,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:11,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931574165] [2021-01-06 10:29:11,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:11,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:11,087 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2021-01-06 10:29:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:11,280 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-01-06 10:29:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:11,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2021-01-06 10:29:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:11,285 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:29:11,285 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:29:11,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:29:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 10:29:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:29:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:29:11,298 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-01-06 10:29:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:11,298 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:29:11,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:29:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:11,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:11,300 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:11,514 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-01-06 10:29:11,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347631760] [2021-01-06 10:29:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:11,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102327917] [2021-01-06 10:29:11,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:29:11,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347631760] [2021-01-06 10:29:12,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102327917] [2021-01-06 10:29:12,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:12,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:29:12,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002118252] [2021-01-06 10:29:12,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:29:12,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:29:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:12,420 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2021-01-06 10:29:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:13,027 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-01-06 10:29:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:29:13,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2021-01-06 10:29:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:13,032 INFO L225 Difference]: With dead ends: 1003 [2021-01-06 10:29:13,032 INFO L226 Difference]: Without dead ends: 954 [2021-01-06 10:29:13,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-01-06 10:29:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-01-06 10:29:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:29:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-01-06 10:29:13,052 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-01-06 10:29:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:13,052 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-01-06 10:29:13,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:29:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-01-06 10:29:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 10:29:13,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:13,053 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:13,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:13,267 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-01-06 10:29:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:13,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280371938] [2021-01-06 10:29:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:13,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:13,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337424343] [2021-01-06 10:29:13,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:13,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:29:13,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280371938] [2021-01-06 10:29:14,313 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337424343] [2021-01-06 10:29:14,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:14,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:29:14,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150559469] [2021-01-06 10:29:14,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:29:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:29:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:14,316 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2021-01-06 10:29:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:15,085 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-01-06 10:29:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:29:15,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 10:29:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:15,094 INFO L225 Difference]: With dead ends: 1163 [2021-01-06 10:29:15,095 INFO L226 Difference]: Without dead ends: 1114 [2021-01-06 10:29:15,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-01-06 10:29:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-01-06 10:29:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:29:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-01-06 10:29:15,121 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-01-06 10:29:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:15,121 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-01-06 10:29:15,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:29:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-01-06 10:29:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:29:15,123 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:15,123 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:15,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:15,338 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-01-06 10:29:15,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277417412] [2021-01-06 10:29:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:15,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947491665] [2021-01-06 10:29:15,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:15,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:29:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:29:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 10:29:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277417412] [2021-01-06 10:29:16,160 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947491665] [2021-01-06 10:29:16,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:16,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:16,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632514157] [2021-01-06 10:29:16,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:16,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:16,164 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2021-01-06 10:29:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:16,381 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-01-06 10:29:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:16,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2021-01-06 10:29:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:16,383 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:29:16,383 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:29:16,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:29:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-01-06 10:29:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:29:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-01-06 10:29:16,399 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-01-06 10:29:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:16,399 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-01-06 10:29:16,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-01-06 10:29:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:29:16,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:16,401 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:16,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:29:16,610 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-01-06 10:29:16,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:16,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760117700] [2021-01-06 10:29:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:16,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:16,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401472174] [2021-01-06 10:29:16,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:16,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:29:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:17,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760117700] [2021-01-06 10:29:17,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:17,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401472174] [2021-01-06 10:29:17,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:17,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:17,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093657581] [2021-01-06 10:29:17,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:29:17,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:29:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:29:17,844 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2021-01-06 10:29:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:19,350 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-01-06 10:29:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:19,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2021-01-06 10:29:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:19,358 INFO L225 Difference]: With dead ends: 1247 [2021-01-06 10:29:19,358 INFO L226 Difference]: Without dead ends: 1204 [2021-01-06 10:29:19,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:29:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-01-06 10:29:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-01-06 10:29:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:29:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-01-06 10:29:19,383 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-01-06 10:29:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:19,383 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-01-06 10:29:19,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:29:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-01-06 10:29:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:29:19,385 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:19,385 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:19,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:29:19,599 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:19,600 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-01-06 10:29:19,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:19,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088362122] [2021-01-06 10:29:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:19,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:19,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465214756] [2021-01-06 10:29:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:32,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:29:32,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:29:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088362122] [2021-01-06 10:29:33,216 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465214756] [2021-01-06 10:29:33,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:33,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316920661] [2021-01-06 10:29:33,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:29:33,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:29:33,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:33,218 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2021-01-06 10:29:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:34,139 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-01-06 10:29:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:29:34,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 10:29:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:34,148 INFO L225 Difference]: With dead ends: 1515 [2021-01-06 10:29:34,148 INFO L226 Difference]: Without dead ends: 1458 [2021-01-06 10:29:34,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-01-06 10:29:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-01-06 10:29:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:29:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-01-06 10:29:34,176 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-01-06 10:29:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:34,176 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-01-06 10:29:34,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:29:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-01-06 10:29:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:29:34,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:34,178 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:34,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:34,379 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-01-06 10:29:34,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:34,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001414871] [2021-01-06 10:29:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:34,401 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:34,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930274580] [2021-01-06 10:29:34,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:34,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:34,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:29:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-01-06 10:29:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001414871] [2021-01-06 10:29:35,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930274580] [2021-01-06 10:29:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874924473] [2021-01-06 10:29:35,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:35,155 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2021-01-06 10:29:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:35,423 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-01-06 10:29:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:35,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-01-06 10:29:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:35,425 INFO L225 Difference]: With dead ends: 172 [2021-01-06 10:29:35,425 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:29:35,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:29:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:29:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:29:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-01-06 10:29:35,447 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-01-06 10:29:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:35,448 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-01-06 10:29:35,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-01-06 10:29:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 10:29:35,450 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:35,450 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:35,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:35,655 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-01-06 10:29:35,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:35,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013867846] [2021-01-06 10:29:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:35,686 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:35,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485246000] [2021-01-06 10:29:35,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:35,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:29:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013867846] [2021-01-06 10:29:37,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485246000] [2021-01-06 10:29:37,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:37,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:29:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865635196] [2021-01-06 10:29:37,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:29:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:29:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:37,334 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2021-01-06 10:29:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:38,594 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-01-06 10:29:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:38,595 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 10:29:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:38,601 INFO L225 Difference]: With dead ends: 1906 [2021-01-06 10:29:38,601 INFO L226 Difference]: Without dead ends: 1844 [2021-01-06 10:29:38,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-01-06 10:29:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-01-06 10:29:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:29:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-01-06 10:29:38,636 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-01-06 10:29:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:38,637 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-01-06 10:29:38,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:29:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-01-06 10:29:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:29:38,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:38,638 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:38,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:38,852 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-01-06 10:29:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:38,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75281454] [2021-01-06 10:29:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:38,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398983258] [2021-01-06 10:29:38,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:38,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:38,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:29:39,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75281454] [2021-01-06 10:29:40,912 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398983258] [2021-01-06 10:29:40,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:40,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 10:29:40,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737580979] [2021-01-06 10:29:40,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:29:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:29:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:40,915 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2021-01-06 10:29:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:42,327 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-01-06 10:29:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:29:42,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2021-01-06 10:29:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:42,335 INFO L225 Difference]: With dead ends: 2156 [2021-01-06 10:29:42,335 INFO L226 Difference]: Without dead ends: 2094 [2021-01-06 10:29:42,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-01-06 10:29:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-01-06 10:29:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:29:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-01-06 10:29:42,372 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-01-06 10:29:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:42,372 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-01-06 10:29:42,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-01-06 10:29:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 10:29:42,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:42,374 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:42,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:42,588 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-01-06 10:29:42,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:42,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180418071] [2021-01-06 10:29:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:42,614 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:42,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930240198] [2021-01-06 10:29:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:43,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:29:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2021-01-06 10:29:43,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180418071] [2021-01-06 10:29:43,319 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:43,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930240198] [2021-01-06 10:29:43,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:43,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:43,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733315332] [2021-01-06 10:29:43,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:43,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:43,320 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2021-01-06 10:29:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:43,542 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-01-06 10:29:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:43,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2021-01-06 10:29:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:43,545 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:29:43,545 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 10:29:43,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 10:29:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-01-06 10:29:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 10:29:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-01-06 10:29:43,568 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-01-06 10:29:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-01-06 10:29:43,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-01-06 10:29:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:29:43,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:43,570 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:43,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:43,774 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:43,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:43,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-01-06 10:29:43,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:43,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970463969] [2021-01-06 10:29:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:43,802 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:43,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885433982] [2021-01-06 10:29:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 10:29:43,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:43,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:29:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:46,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970463969] [2021-01-06 10:29:46,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:46,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885433982] [2021-01-06 10:29:46,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:46,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-01-06 10:29:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532473933] [2021-01-06 10:29:46,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:29:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:29:46,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:29:46,389 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2021-01-06 10:29:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:50,461 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-01-06 10:29:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:29:50,462 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2021-01-06 10:29:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:50,469 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:29:50,469 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 10:29:50,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:29:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 10:29:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-01-06 10:29:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:29:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-01-06 10:29:50,513 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-01-06 10:29:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:50,513 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-01-06 10:29:50,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:29:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-01-06 10:29:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 10:29:50,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:50,515 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:50,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:29:50,730 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-01-06 10:29:50,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:50,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631628951] [2021-01-06 10:29:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:50,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:50,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441235188] [2021-01-06 10:29:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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