/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-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:56:48,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:56:48,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:56:48,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:56:48,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:56:48,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:56:48,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:56:48,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:56:48,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:56:48,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:56:48,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:56:48,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:56:48,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:56:48,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:56:48,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:56:49,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:56:49,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:56:49,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:56:49,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:56:49,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:56:49,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:56:49,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:56:49,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:56:49,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:56:49,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:56:49,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:56:49,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:56:49,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:56:49,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:56:49,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:56:49,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:56:49,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:56:49,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:56:49,124 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:56:49,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:56:49,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:56:49,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:56:49,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:56:49,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:56:49,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:56:49,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:56:49,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:56:49,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:56:49,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:56:49,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:56:49,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:56:49,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:56:49,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:56:49,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:56:49,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:56:49,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:56:49,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:56:49,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:56:49,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:56:49,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:56:49,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:56:49,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:56:49,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:56:49,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:56:49,645 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:56:49,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2021-01-06 09:56:49,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88b6ee134/860142cdbdb5456eb53284907ec194ff/FLAG2c83534a4 [2021-01-06 09:56:50,487 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:56:50,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2021-01-06 09:56:50,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88b6ee134/860142cdbdb5456eb53284907ec194ff/FLAG2c83534a4 [2021-01-06 09:56:50,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/88b6ee134/860142cdbdb5456eb53284907ec194ff [2021-01-06 09:56:50,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:56:50,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:56:50,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:56:50,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:56:50,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:56:50,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:50" (1/1) ... [2021-01-06 09:56:50,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f84430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:50, skipping insertion in model container [2021-01-06 09:56:50,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:56:50" (1/1) ... [2021-01-06 09:56:50,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:56:50,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:56:51,024 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-examples/standard_partition_ground-1.i[860,873] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~aa~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~bb~0,],[IdentifierExpression[~b~0,]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~cc~0,],[IdentifierExpression[~c~0,]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:56:51,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:56:51,058 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:56:51,074 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-examples/standard_partition_ground-1.i[860,873] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#aa~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#aa~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#bb~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#bb~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~b~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#cc~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#cc~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~c~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:56:51,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:56:51,105 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:56:51,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51 WrapperNode [2021-01-06 09:56:51,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:56:51,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:56:51,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:56:51,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:56:51,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:56:51,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:56:51,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:56:51,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:56:51,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... [2021-01-06 09:56:51,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:56:51,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:56:51,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:56:51,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:56:51,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:56:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:56:51,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:56:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:56:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:56:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:56:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:56:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:56:51,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:56:51,801 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 09:56:51,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:56:51 BoogieIcfgContainer [2021-01-06 09:56:51,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:56:51,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:56:51,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:56:51,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:56:51,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:56:50" (1/3) ... [2021-01-06 09:56:51,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff77dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:56:51, skipping insertion in model container [2021-01-06 09:56:51,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:56:51" (2/3) ... [2021-01-06 09:56:51,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff77dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:56:51, skipping insertion in model container [2021-01-06 09:56:51,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:56:51" (3/3) ... [2021-01-06 09:56:51,820 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2021-01-06 09:56:51,827 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:56:51,833 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 09:56:51,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 09:56:51,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:56:51,909 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:56:51,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:56:51,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:56:51,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:56:51,910 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:56:51,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:56:51,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:56:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 09:56:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:56:51,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:51,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:51,938 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 232427437, now seen corresponding path program 1 times [2021-01-06 09:56:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551657696] [2021-01-06 09:56:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:56:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551657696] [2021-01-06 09:56:52,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:56:52,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:56:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680003790] [2021-01-06 09:56:52,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:56:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:56:52,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:56:52,160 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2021-01-06 09:56:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:52,179 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2021-01-06 09:56:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:56:52,181 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 09:56:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:52,192 INFO L225 Difference]: With dead ends: 49 [2021-01-06 09:56:52,192 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 09:56:52,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:56:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 09:56:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 09:56:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:56:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 09:56:52,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-01-06 09:56:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:52,240 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 09:56:52,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:56:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 09:56:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:56:52,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:52,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:52,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:56:52,242 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash -950337193, now seen corresponding path program 1 times [2021-01-06 09:56:52,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:52,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180459032] [2021-01-06 09:56:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:56:52,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180459032] [2021-01-06 09:56:52,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:56:52,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:56:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685981613] [2021-01-06 09:56:52,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:56:52,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:56:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:56:52,381 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2021-01-06 09:56:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:52,453 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-01-06 09:56:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:56:52,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:56:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:52,456 INFO L225 Difference]: With dead ends: 47 [2021-01-06 09:56:52,456 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 09:56:52,458 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 [2021-01-06 09:56:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 09:56:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-01-06 09:56:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 09:56:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 09:56:52,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-01-06 09:56:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:52,468 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 09:56:52,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:56:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 09:56:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:56:52,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:52,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:52,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:56:52,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash 166796571, now seen corresponding path program 1 times [2021-01-06 09:56:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:52,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124262720] [2021-01-06 09:56:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:56:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124262720] [2021-01-06 09:56:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119357749] [2021-01-06 09:56:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:56:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:56:52,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:52,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:56:52,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223156459] [2021-01-06 09:56:52,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:56:52,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:52,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:56:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:56:52,832 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-06 09:56:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:52,924 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 09:56:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:56:52,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 09:56:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:52,926 INFO L225 Difference]: With dead ends: 54 [2021-01-06 09:56:52,926 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:56:52,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:56:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:56:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-01-06 09:56:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 09:56:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 09:56:52,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2021-01-06 09:56:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:52,934 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 09:56:52,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:56:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 09:56:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:56:52,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:52,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:53,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:56:53,152 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1231666793, now seen corresponding path program 2 times [2021-01-06 09:56:53,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:53,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382997432] [2021-01-06 09:56:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 09:56:53,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382997432] [2021-01-06 09:56:53,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:56:53,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 09:56:53,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597178280] [2021-01-06 09:56:53,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 09:56:53,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:53,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 09:56:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 09:56:53,284 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2021-01-06 09:56:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:53,322 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-01-06 09:56:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:56:53,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-01-06 09:56:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:53,325 INFO L225 Difference]: With dead ends: 72 [2021-01-06 09:56:53,325 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:56:53,326 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 [2021-01-06 09:56:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:56:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-01-06 09:56:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:56:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-01-06 09:56:53,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 21 [2021-01-06 09:56:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:53,336 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-01-06 09:56:53,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 09:56:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-01-06 09:56:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:56:53,337 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:53,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:53,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 09:56:53,338 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash 48196885, now seen corresponding path program 1 times [2021-01-06 09:56:53,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:53,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663826594] [2021-01-06 09:56:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:56:53,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663826594] [2021-01-06 09:56:53,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735199455] [2021-01-06 09:56:53,419 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:56:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:56:53,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:53,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:56:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849416771] [2021-01-06 09:56:53,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:56:53,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:56:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:56:53,568 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 6 states. [2021-01-06 09:56:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:53,717 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2021-01-06 09:56:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:56:53,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:56:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:53,722 INFO L225 Difference]: With dead ends: 98 [2021-01-06 09:56:53,722 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:56:53,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:56:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:56:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-01-06 09:56:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:56:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2021-01-06 09:56:53,743 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 21 [2021-01-06 09:56:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:53,743 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2021-01-06 09:56:53,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:56:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2021-01-06 09:56:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:56:53,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:53,745 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:53,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:53,959 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -491835875, now seen corresponding path program 2 times [2021-01-06 09:56:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:53,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926596212] [2021-01-06 09:56:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:56:54,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926596212] [2021-01-06 09:56:54,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739252489] [2021-01-06 09:56:54,097 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:54,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:56:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:56:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:56:54,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:54,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:56:54,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351290104] [2021-01-06 09:56:54,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:56:54,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:54,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:56:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:56:54,297 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 7 states. [2021-01-06 09:56:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:54,406 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2021-01-06 09:56:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:56:54,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-01-06 09:56:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:54,409 INFO L225 Difference]: With dead ends: 116 [2021-01-06 09:56:54,409 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:56:54,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:56:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:56:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-01-06 09:56:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 09:56:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2021-01-06 09:56:54,420 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 27 [2021-01-06 09:56:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:54,421 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2021-01-06 09:56:54,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:56:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2021-01-06 09:56:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:56:54,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:54,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:54,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:54,636 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1359435477, now seen corresponding path program 3 times [2021-01-06 09:56:54,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:54,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980114949] [2021-01-06 09:56:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 09:56:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980114949] [2021-01-06 09:56:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436618163] [2021-01-06 09:56:54,775 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:56:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:56:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 09:56:54,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:54,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:56:54,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989311268] [2021-01-06 09:56:54,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:56:54,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:54,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:56:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:56:54,991 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 8 states. [2021-01-06 09:56:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:55,116 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2021-01-06 09:56:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:56:55,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2021-01-06 09:56:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:55,118 INFO L225 Difference]: With dead ends: 134 [2021-01-06 09:56:55,118 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 09:56:55,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:56:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 09:56:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2021-01-06 09:56:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 09:56:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-01-06 09:56:55,130 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 33 [2021-01-06 09:56:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:55,132 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-01-06 09:56:55,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:56:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-01-06 09:56:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:56:55,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:55,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:55,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:55,352 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash 128035293, now seen corresponding path program 4 times [2021-01-06 09:56:55,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:55,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479309201] [2021-01-06 09:56:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:55,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479309201] [2021-01-06 09:56:55,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682665576] [2021-01-06 09:56:55,531 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:55,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:56:55,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:56:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 09:56:55,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:55,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:56:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005326928] [2021-01-06 09:56:55,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:56:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:56:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:56:55,700 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 9 states. [2021-01-06 09:56:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:55,810 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2021-01-06 09:56:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:56:55,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2021-01-06 09:56:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:55,811 INFO L225 Difference]: With dead ends: 152 [2021-01-06 09:56:55,812 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 09:56:55,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:56:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 09:56:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-01-06 09:56:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:56:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-01-06 09:56:55,823 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 39 [2021-01-06 09:56:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:55,824 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-01-06 09:56:55,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:56:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-01-06 09:56:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:56:55,826 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:55,826 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:56,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:56,040 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1662394219, now seen corresponding path program 5 times [2021-01-06 09:56:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:56,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135683636] [2021-01-06 09:56:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:56,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135683636] [2021-01-06 09:56:56,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642230202] [2021-01-06 09:56:56,208 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:56,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 09:56:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:56,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:56:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 09:56:56,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:56:56,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:56:56,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535466321] [2021-01-06 09:56:56,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:56:56,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:56:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:56:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:56:56,657 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 10 states. [2021-01-06 09:56:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:56:56,773 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2021-01-06 09:56:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:56:56,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2021-01-06 09:56:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:56:56,775 INFO L225 Difference]: With dead ends: 170 [2021-01-06 09:56:56,775 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 09:56:56,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:56:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 09:56:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-01-06 09:56:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 09:56:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2021-01-06 09:56:56,786 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 45 [2021-01-06 09:56:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:56:56,787 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2021-01-06 09:56:56,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:56:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2021-01-06 09:56:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:56:56,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:56:56,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:56:57,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:57,004 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:56:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:56:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1210402205, now seen corresponding path program 6 times [2021-01-06 09:56:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:56:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429600892] [2021-01-06 09:56:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:56:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:56:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 09:56:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429600892] [2021-01-06 09:56:57,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874696550] [2021-01-06 09:56:57,179 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:56:57,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:56:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:56:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 09:56:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:56:57,424 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,425 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-01-06 09:56:57,431 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,441 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-01-06 09:56:57,531 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-01-06 09:56:57,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-01-06 09:56:57,662 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,663 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 09:56:57,668 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:57,673 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,701 INFO L625 ElimStorePlain]: treesize reduction 22, result has 62.1 percent of original size [2021-01-06 09:56:57,705 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,705 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:22 [2021-01-06 09:56:57,756 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,757 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 09:56:57,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:57,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,792 INFO L625 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2021-01-06 09:56:57,796 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:28 [2021-01-06 09:56:57,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:57,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:57,882 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-01-06 09:56:57,883 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,905 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:57,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 09:56:57,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:57,913 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:57,980 INFO L625 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-01-06 09:56:57,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 09:56:57,986 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:39 [2021-01-06 09:56:58,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:56:58,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:56:58,070 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:56:58,070 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 49 [2021-01-06 09:56:58,078 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:58,099 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 09:56:58,100 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:56:58,169 INFO L625 ElimStorePlain]: treesize reduction 24, result has 76.2 percent of original size [2021-01-06 09:56:58,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-01-06 09:56:58,175 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:77 [2021-01-06 09:56:58,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:01,702 WARN L197 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-01-06 09:57:01,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:03,490 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:03,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 104 [2021-01-06 09:57:03,498 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:03,539 INFO L625 ElimStorePlain]: treesize reduction 76, result has 46.5 percent of original size [2021-01-06 09:57:03,546 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 09:57:03,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:70, output treesize:66 [2021-01-06 09:57:03,860 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2021-01-06 09:57:03,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2021-01-06 09:57:03,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:03,945 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2021-01-06 09:57:03,970 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 09:57:03,970 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:66 [2021-01-06 09:57:06,315 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-01-06 09:57:06,316 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2021-01-06 09:57:06,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2021-01-06 09:57:06,325 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,403 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2021-01-06 09:57:06,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2021-01-06 09:57:06,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:90, output treesize:66 [2021-01-06 09:57:06,714 INFO L348 Elim1Store]: treesize reduction 17, result has 81.9 percent of original size [2021-01-06 09:57:06,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 89 [2021-01-06 09:57:06,721 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 09:57:06,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,723 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2021-01-06 09:57:06,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:06,724 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2021-01-06 09:57:06,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:06,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,729 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2021-01-06 09:57:06,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:06,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,733 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2021-01-06 09:57:06,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:06,740 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-01-06 09:57:06,770 INFO L625 ElimStorePlain]: treesize reduction 58, result has 27.5 percent of original size [2021-01-06 09:57:06,773 INFO L547 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:06,773 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:78, output treesize:7 [2021-01-06 09:57:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 40 proven. 85 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 09:57:06,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:06,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23] total 31 [2021-01-06 09:57:06,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066543231] [2021-01-06 09:57:06,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 09:57:06,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 09:57:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=721, Unknown=5, NotChecked=0, Total=930 [2021-01-06 09:57:06,849 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 31 states. [2021-01-06 09:57:12,127 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-01-06 09:57:16,920 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-01-06 09:57:26,780 WARN L197 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-01-06 09:57:38,258 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 09:57:46,633 WARN L197 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-01-06 09:57:56,068 WARN L197 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 09:58:03,345 WARN L197 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 56 [2021-01-06 09:58:13,040 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 09:58:20,892 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 09:58:31,215 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-01-06 09:58:39,419 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-01-06 09:58:41,716 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-01-06 09:59:22,589 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-01-06 09:59:51,420 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-01-06 10:00:17,325 WARN L197 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-01-06 10:00:17,544 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-01-06 10:00:30,671 WARN L197 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-01-06 10:01:12,510 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-01-06 10:01:26,992 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43