/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-crafted/zero_sum_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:51:28,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:51:28,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:51:28,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:51:28,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:51:28,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:51:28,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:51:28,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:51:28,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:51:28,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:51:28,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:51:28,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:51:28,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:51:28,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:51:28,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:51:28,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:51:28,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:51:28,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:51:28,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:51:28,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:51:28,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:51:28,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:51:28,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:51:28,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:51:28,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:51:28,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:51:28,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:51:28,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:51:28,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:51:28,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:51:28,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:51:28,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:51:28,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:51:28,754 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:51:28,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:51:28,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:51:28,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:51:28,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:51:28,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:51:28,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:51:28,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:51:28,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:51:28,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:51:28,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:51:28,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:51:28,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:51:28,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:51:28,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:51:28,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:51:28,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:51:28,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:51:28,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:51:28,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:51:28,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:51:28,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:51:29,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:51:29,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:51:29,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:51:29,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:51:29,387 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:51:29,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2020-12-23 00:51:29,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3888fe06d/8414e21a65154a9ebb81155c9079f52d/FLAGa51f334ff [2020-12-23 00:51:30,250 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:51:30,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2020-12-23 00:51:30,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3888fe06d/8414e21a65154a9ebb81155c9079f52d/FLAGa51f334ff [2020-12-23 00:51:30,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3888fe06d/8414e21a65154a9ebb81155c9079f52d [2020-12-23 00:51:30,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:51:30,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:51:30,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:51:30,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:51:30,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:51:30,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:51:30" (1/1) ... [2020-12-23 00:51:30,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a9ca2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:30, skipping insertion in model container [2020-12-23 00:51:30,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:51:30" (1/1) ... [2020-12-23 00:51:30,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:51:30,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:51:30,981 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-crafted/zero_sum_m3.c[402,415] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:51:31,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:51:31,070 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:51:31,098 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-crafted/zero_sum_m3.c[402,415] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] 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[2],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:51:31,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:51:31,142 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:51:31,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31 WrapperNode [2020-12-23 00:51:31,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:51:31,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:51:31,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:51:31,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:51:31,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:51:31,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:51:31,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:51:31,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:51:31,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (1/1) ... [2020-12-23 00:51:31,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:51:31,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:51:31,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:51:31,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:51:31,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (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 [2020-12-23 00:51:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:51:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:51:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:51:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:51:31,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:51:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:51:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:51:31,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:51:31,978 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 00:51:31,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:51:31 BoogieIcfgContainer [2020-12-23 00:51:31,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:51:31,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:51:31,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:51:31,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:51:31,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:51:30" (1/3) ... [2020-12-23 00:51:31,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8686a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:51:31, skipping insertion in model container [2020-12-23 00:51:31,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:51:31" (2/3) ... [2020-12-23 00:51:31,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8686a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:51:31, skipping insertion in model container [2020-12-23 00:51:31,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:51:31" (3/3) ... [2020-12-23 00:51:31,995 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2020-12-23 00:51:32,006 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:51:32,016 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:51:32,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:51:32,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:51:32,154 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:51:32,155 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:51:32,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:51:32,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:51:32,156 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:51:32,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:51:32,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:51:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 00:51:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:51:32,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:32,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:32,230 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2020-12-23 00:51:32,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:32,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370004686] [2020-12-23 00:51:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:51:32,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370004686] [2020-12-23 00:51:32,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:51:32,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:51:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364165749] [2020-12-23 00:51:32,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:51:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:32,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:51:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:51:32,507 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-23 00:51:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:32,536 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2020-12-23 00:51:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:51:32,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-23 00:51:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:32,551 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:51:32,551 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:51:32,556 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 [2020-12-23 00:51:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:51:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 00:51:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:51:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-23 00:51:32,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2020-12-23 00:51:32,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:32,608 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-23 00:51:32,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:51:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-23 00:51:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:51:32,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:32,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:32,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:51:32,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2020-12-23 00:51:32,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:32,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840883547] [2020-12-23 00:51:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:51:32,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840883547] [2020-12-23 00:51:32,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:51:32,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:51:32,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153809061] [2020-12-23 00:51:32,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:51:32,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:51:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:51:32,801 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2020-12-23 00:51:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:32,883 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-12-23 00:51:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:51:32,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:51:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:32,885 INFO L225 Difference]: With dead ends: 51 [2020-12-23 00:51:32,885 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:51:32,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:51:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:51:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:51:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:51:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 00:51:32,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2020-12-23 00:51:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:32,897 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 00:51:32,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:51:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 00:51:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:51:32,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:32,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:32,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:51:32,900 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2020-12-23 00:51:32,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:32,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198569169] [2020-12-23 00:51:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:51:33,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198569169] [2020-12-23 00:51:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:51:33,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:51:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881036266] [2020-12-23 00:51:33,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:51:33,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:51:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:51:33,050 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-12-23 00:51:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:33,329 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-12-23 00:51:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:51:33,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 00:51:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:33,335 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:51:33,335 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:51:33,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:51:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:51:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-23 00:51:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:51:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-23 00:51:33,360 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2020-12-23 00:51:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:33,360 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-23 00:51:33,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:51:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-23 00:51:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:51:33,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:33,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:33,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:51:33,368 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2020-12-23 00:51:33,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:33,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727336703] [2020-12-23 00:51:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:51:33,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727336703] [2020-12-23 00:51:33,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967361055] [2020-12-23 00:51:33,563 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 [2020-12-23 00:51:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:51:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:51:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:51:33,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:51:33,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:51:33,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909017192] [2020-12-23 00:51:33,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:51:33,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:51:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:51:33,890 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-12-23 00:51:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:34,033 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-12-23 00:51:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:51:34,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-23 00:51:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:34,037 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:51:34,037 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:51:34,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:51:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:51:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-23 00:51:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 00:51:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-23 00:51:34,048 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2020-12-23 00:51:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:34,049 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-23 00:51:34,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:51:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-23 00:51:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:51:34,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:34,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:34,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:51:34,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2020-12-23 00:51:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412298682] [2020-12-23 00:51:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:51:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412298682] [2020-12-23 00:51:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865701565] [2020-12-23 00:51:34,384 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 [2020-12-23 00:51:34,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:51:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:51:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:51:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:51:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:51:34,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:51:34,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 00:51:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173846604] [2020-12-23 00:51:34,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:51:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:51:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:51:34,558 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-12-23 00:51:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:34,768 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-12-23 00:51:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:51:34,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:51:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:34,771 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:51:34,771 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:51:34,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:51:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:51:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-23 00:51:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:51:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-23 00:51:34,782 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2020-12-23 00:51:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:34,783 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-23 00:51:34,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:51:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-23 00:51:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:51:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:34,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:35,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:51:35,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2020-12-23 00:51:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951073142] [2020-12-23 00:51:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:51:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951073142] [2020-12-23 00:51:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064637757] [2020-12-23 00:51:38,097 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 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 [2020-12-23 00:51:38,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:51:38,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:51:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 00:51:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:51:39,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:51:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:51:39,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:51:39,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 33 [2020-12-23 00:51:39,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355800328] [2020-12-23 00:51:39,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 00:51:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 00:51:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:51:39,624 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 33 states. [2020-12-23 00:51:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:41,348 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-12-23 00:51:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:51:41,349 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2020-12-23 00:51:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:41,351 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:51:41,351 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:51:41,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 24 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:51:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:51:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-12-23 00:51:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 00:51:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-12-23 00:51:41,367 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2020-12-23 00:51:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:41,368 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-12-23 00:51:41,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 00:51:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-12-23 00:51:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:51:41,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:41,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:41,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:51:41,585 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2020-12-23 00:51:41,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:41,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021598524] [2020-12-23 00:51:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:51:41,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021598524] [2020-12-23 00:51:41,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007464189] [2020-12-23 00:51:41,713 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 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 [2020-12-23 00:51:41,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:51:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:51:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:51:41,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:51:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 00:51:41,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:51:41,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:51:41,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3906557] [2020-12-23 00:51:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:51:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:41,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:51:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:51:41,959 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 13 states. [2020-12-23 00:51:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:42,371 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2020-12-23 00:51:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:51:42,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-23 00:51:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:42,385 INFO L225 Difference]: With dead ends: 152 [2020-12-23 00:51:42,385 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:51:42,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:51:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:51:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 00:51:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 00:51:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-23 00:51:42,430 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2020-12-23 00:51:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:42,431 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-23 00:51:42,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:51:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-23 00:51:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:51:42,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:42,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:42,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:51:42,655 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2020-12-23 00:51:42,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:42,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538065241] [2020-12-23 00:51:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 00:51:42,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538065241] [2020-12-23 00:51:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425638187] [2020-12-23 00:51:42,781 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 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 [2020-12-23 00:51:42,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:51:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:51:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:51:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:51:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 00:51:43,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:51:43,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 00:51:43,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68729398] [2020-12-23 00:51:43,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:51:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:51:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:51:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:51:43,159 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 16 states. [2020-12-23 00:51:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:51:43,723 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-12-23 00:51:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:51:43,724 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-12-23 00:51:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:51:43,725 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:51:43,726 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:51:43,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:51:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:51:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-12-23 00:51:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:51:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-23 00:51:43,738 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2020-12-23 00:51:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:51:43,738 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-23 00:51:43,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:51:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-23 00:51:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:51:43,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:51:43,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:51:43,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:51:43,954 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:51:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:51:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2020-12-23 00:51:43,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:51:43,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071919263] [2020-12-23 00:51:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:51:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:51:45,854 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-23 00:51:46,733 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-23 00:51:46,983 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-23 00:51:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:51:49,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071919263] [2020-12-23 00:51:49,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467076297] [2020-12-23 00:51:49,790 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 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 [2020-12-23 00:51:49,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:51:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:51:49,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-23 00:51:49,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:52:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:52:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:52:01,024 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:52:01,026 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 43 [2020-12-23 00:52:01,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:01,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:01,037 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 00:52:01,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:01,051 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2020-12-23 00:52:01,093 INFO L625 ElimStorePlain]: treesize reduction 6, result has 81.8 percent of original size [2020-12-23 00:52:01,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:01,101 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:52:01,102 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:31 [2020-12-23 00:52:01,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:01,598 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:01,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:01,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:01,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:01,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 92 [2020-12-23 00:52:01,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917797057] [2020-12-23 00:52:01,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 00:52:01,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 00:52:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=7774, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 00:52:01,914 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 92 states. [2020-12-23 00:52:04,133 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-12-23 00:52:04,725 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-12-23 00:52:05,207 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-12-23 00:52:06,133 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-12-23 00:52:07,775 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-23 00:52:08,211 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-23 00:52:08,714 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-12-23 00:52:09,501 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-12-23 00:52:10,105 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-12-23 00:52:13,298 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-23 00:52:13,783 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-23 00:52:17,199 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-23 00:52:19,428 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-12-23 00:52:22,274 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-12-23 00:52:22,719 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-12-23 00:52:24,160 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-23 00:52:25,379 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-23 00:52:25,894 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-23 00:52:26,772 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-12-23 00:52:28,331 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-23 00:52:33,946 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 00:52:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:36,142 INFO L93 Difference]: Finished difference Result 235 states and 259 transitions. [2020-12-23 00:52:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 00:52:36,143 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 61 [2020-12-23 00:52:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:36,146 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:52:36,146 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 00:52:36,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=1199, Invalid=16093, Unknown=0, NotChecked=0, Total=17292 [2020-12-23 00:52:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 00:52:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 109. [2020-12-23 00:52:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 00:52:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2020-12-23 00:52:36,179 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2020-12-23 00:52:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:36,179 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2020-12-23 00:52:36,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 00:52:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2020-12-23 00:52:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:52:36,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:36,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:36,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:36,391 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2020-12-23 00:52:36,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:36,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728038170] [2020-12-23 00:52:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:52:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728038170] [2020-12-23 00:52:36,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803086016] [2020-12-23 00:52:36,570 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 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 [2020-12-23 00:52:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:36,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:52:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 00:52:36,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:36,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:52:36,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791120751] [2020-12-23 00:52:36,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:52:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:52:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:52:36,922 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 16 states. [2020-12-23 00:52:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:37,780 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2020-12-23 00:52:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:52:37,781 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-12-23 00:52:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:37,783 INFO L225 Difference]: With dead ends: 225 [2020-12-23 00:52:37,784 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:52:37,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:52:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:52:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 00:52:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 00:52:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2020-12-23 00:52:37,844 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2020-12-23 00:52:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:37,844 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2020-12-23 00:52:37,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:52:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2020-12-23 00:52:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 00:52:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:37,847 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:38,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:52:38,051 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2020-12-23 00:52:38,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:38,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676593384] [2020-12-23 00:52:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:52:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676593384] [2020-12-23 00:52:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649598967] [2020-12-23 00:52:38,236 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 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 [2020-12-23 00:52:38,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:52:38,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:52:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:52:38,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:38,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:52:38,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158309625] [2020-12-23 00:52:38,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:52:38,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:38,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:52:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:52:38,556 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 16 states. [2020-12-23 00:52:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:39,339 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-12-23 00:52:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:52:39,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-12-23 00:52:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:39,345 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:52:39,346 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 00:52:39,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:52:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 00:52:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-12-23 00:52:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:52:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-12-23 00:52:39,365 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-12-23 00:52:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:39,365 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-12-23 00:52:39,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:52:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-12-23 00:52:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:52:39,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:39,367 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:39,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:52:39,583 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2020-12-23 00:52:39,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:39,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599875542] [2020-12-23 00:52:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:40,968 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-23 00:52:41,238 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-23 00:52:41,455 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-23 00:52:41,674 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-12-23 00:52:41,878 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-23 00:52:42,952 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 00:52:43,255 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-23 00:52:43,516 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 00:52:43,738 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-23 00:52:43,964 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-23 00:52:44,853 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-12-23 00:52:45,157 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-23 00:52:45,488 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-23 00:52:45,771 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-23 00:52:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:52,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599875542] [2020-12-23 00:52:52,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167391605] [2020-12-23 00:52:52,327 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 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 [2020-12-23 00:52:52,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:52:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:52,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2020-12-23 00:52:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:52,574 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:52:52,575 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:52:52,586 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:52:52,588 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:52:52,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-23 00:53:15,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:53:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:53:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:53:15,697 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:15,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2020-12-23 00:53:15,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:15,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:15,703 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 00:53:15,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:53:15,704 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-23 00:53:15,704 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:53:15,710 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:53:15,737 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:53:15,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:53:15,742 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:53:15,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2020-12-23 00:53:16,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:53:16,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:53:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:53:17,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:53:17,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 56] total 115 [2020-12-23 00:53:17,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013155328] [2020-12-23 00:53:17,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 115 states [2020-12-23 00:53:17,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2020-12-23 00:53:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=12652, Unknown=0, NotChecked=0, Total=13110 [2020-12-23 00:53:17,241 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 115 states. [2020-12-23 00:53:23,007 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 21 [2020-12-23 00:53:24,237 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-12-23 00:53:25,982 WARN L197 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-12-23 00:53:29,308 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-12-23 00:53:29,993 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-23 00:53:31,449 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-12-23 00:53:32,665 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-12-23 00:53:33,266 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-23 00:53:34,904 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2020-12-23 00:53:36,531 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 82 [2020-12-23 00:53:38,352 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 59 [2020-12-23 00:53:39,458 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-12-23 00:53:40,478 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-12-23 00:53:42,219 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2020-12-23 00:53:42,833 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-12-23 00:53:47,970 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2020-12-23 00:53:49,372 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-12-23 00:53:49,982 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-12-23 00:53:51,056 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-12-23 00:53:52,422 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-23 00:53:56,741 WARN L197 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2020-12-23 00:53:59,333 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-12-23 00:54:04,392 WARN L197 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2020-12-23 00:54:09,907 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-23 00:54:11,259 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-12-23 00:54:13,438 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-12-23 00:54:18,166 WARN L197 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-23 00:54:21,270 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2020-12-23 00:54:24,897 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 112 DAG size of output: 101 [2020-12-23 00:54:26,369 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-23 00:54:27,883 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-12-23 00:54:28,904 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-12-23 00:54:32,365 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 94 [2020-12-23 00:54:33,543 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-12-23 00:54:37,592 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-23 00:54:44,932 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2020-12-23 00:54:47,780 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-12-23 00:54:48,800 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-23 00:54:49,933 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2020-12-23 00:54:52,597 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-12-23 00:54:53,414 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-12-23 00:54:56,548 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-12-23 00:55:00,707 WARN L197 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-12-23 00:55:02,991 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-12-23 00:55:04,826 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-23 00:55:07,227 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-12-23 00:55:07,953 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-23 00:55:10,350 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-23 00:55:13,166 WARN L197 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-23 00:55:15,630 WARN L197 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-12-23 00:55:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:16,488 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2020-12-23 00:55:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-12-23 00:55:16,492 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 75 [2020-12-23 00:55:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:16,494 INFO L225 Difference]: With dead ends: 206 [2020-12-23 00:55:16,494 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 00:55:16,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10435 ImplicationChecksByTransitivity, 126.4s TimeCoverageRelationStatistics Valid=1447, Invalid=42861, Unknown=2, NotChecked=0, Total=44310 [2020-12-23 00:55:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 00:55:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 133. [2020-12-23 00:55:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 00:55:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2020-12-23 00:55:16,534 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 75 [2020-12-23 00:55:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:16,534 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2020-12-23 00:55:16,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2020-12-23 00:55:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2020-12-23 00:55:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:55:16,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:16,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:16,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:16,750 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2020-12-23 00:55:16,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:16,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452426563] [2020-12-23 00:55:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:55:17,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452426563] [2020-12-23 00:55:17,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367769987] [2020-12-23 00:55:17,109 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 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 [2020-12-23 00:55:17,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:55:17,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:55:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:55:17,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:55:17,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2020-12-23 00:55:17,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630781031] [2020-12-23 00:55:17,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:55:17,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:17,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:55:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:55:17,899 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand 19 states. [2020-12-23 00:55:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:19,627 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-12-23 00:55:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:55:19,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-12-23 00:55:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:19,632 INFO L225 Difference]: With dead ends: 275 [2020-12-23 00:55:19,632 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:55:19,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-23 00:55:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:55:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-23 00:55:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 00:55:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2020-12-23 00:55:19,657 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 77 [2020-12-23 00:55:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:19,657 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2020-12-23 00:55:19,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:55:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2020-12-23 00:55:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:55:19,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:19,660 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:19,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:19,872 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2020-12-23 00:55:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682202015] [2020-12-23 00:55:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-23 00:55:20,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682202015] [2020-12-23 00:55:20,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535529302] [2020-12-23 00:55:20,265 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 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 [2020-12-23 00:55:20,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:55:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:55:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-23 00:55:21,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:55:21,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 00:55:21,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156726777] [2020-12-23 00:55:21,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:55:21,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:55:21,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:55:21,499 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 24 states. [2020-12-23 00:55:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:23,559 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2020-12-23 00:55:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:55:23,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-12-23 00:55:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:23,564 INFO L225 Difference]: With dead ends: 185 [2020-12-23 00:55:23,564 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:55:23,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:55:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:55:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 00:55:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:55:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-12-23 00:55:23,579 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-12-23 00:55:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:23,579 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-12-23 00:55:23,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:55:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-12-23 00:55:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:55:23,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:23,580 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:23,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:55:23,781 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:23,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2020-12-23 00:55:23,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:23,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601018201] [2020-12-23 00:55:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:25,102 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-12-23 00:55:25,297 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-12-23 00:55:25,611 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 16 [2020-12-23 00:55:25,820 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-23 00:55:26,122 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-23 00:55:26,461 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-23 00:55:26,771 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-12-23 00:55:27,094 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-23 00:55:27,436 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-23 00:55:27,801 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-23 00:55:28,101 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 00:55:28,332 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-23 00:55:28,625 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-23 00:55:28,917 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-23 00:55:29,270 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-23 00:55:29,624 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-12-23 00:55:30,012 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-23 00:55:30,397 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-12-23 00:55:30,803 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-12-23 00:55:31,221 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-12-23 00:55:31,618 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-23 00:55:32,009 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 00:55:32,429 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 00:55:32,739 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-23 00:55:33,041 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-23 00:55:33,374 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-23 00:55:33,713 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-23 00:55:34,070 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-12-23 00:55:34,440 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 00:55:34,810 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 00:55:35,220 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-23 00:55:35,634 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-23 00:55:35,941 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-12-23 00:55:36,259 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-23 00:55:36,587 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-12-23 00:55:37,759 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44