/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-bitabs-dcfa08f
[2020-12-23 16:53:58,764 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-12-23 16:53:58,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-12-23 16:53:58,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-12-23 16:53:58,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-12-23 16:53:58,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-12-23 16:53:58,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-12-23 16:53:58,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-12-23 16:53:58,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-12-23 16:53:58,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-12-23 16:53:58,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-12-23 16:53:58,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-12-23 16:53:58,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
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[2020-12-23 16:53:58,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2020-12-23 16:53:58,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-12-23 16:53:58,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-12-23 16:53:58,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2020-12-23 16:53:58,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-12-23 16:53:58,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf
[2020-12-23 16:53:58,963 INFO L113 SettingsManager]: Loading preferences was successful
[2020-12-23 16:53:58,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-12-23 16:53:58,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-12-23 16:53:58,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-12-23 16:53:58,966 INFO L138 SettingsManager]: * Use SBE=true
[2020-12-23 16:53:58,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-12-23 16:53:58,966 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false
[2020-12-23 16:53:58,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-12-23 16:53:58,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-12-23 16:53:58,967 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true
[2020-12-23 16:53:58,967 INFO L138 SettingsManager]: * Bitprecise bitfields=true
[2020-12-23 16:53:58,968 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true
[2020-12-23 16:53:58,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-12-23 16:53:58,968 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true
[2020-12-23 16:53:58,968 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-12-23 16:53:58,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-12-23 16:53:58,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-12-23 16:53:58,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-12-23 16:53:58,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-12-23 16:53:58,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-12-23 16:53:58,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-12-23 16:53:58,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-12-23 16:53:58,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-12-23 16:53:58,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-12-23 16:53:58,971 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-12-23 16:53:59,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-12-23 16:53:59,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-12-23 16:53:59,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-12-23 16:53:59,434 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-12-23 16:53:59,436 INFO L275 PluginConnector]: CDTParser initialized
[2020-12-23 16:53:59,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i
[2020-12-23 16:53:59,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbbcb532e/65655c0452ee49ecbc36cb7263d2d6cc/FLAG3d63dacab
[2020-12-23 16:54:00,229 INFO L306 CDTParser]: Found 1 translation units.
[2020-12-23 16:54:00,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i
[2020-12-23 16:54:00,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbbcb532e/65655c0452ee49ecbc36cb7263d2d6cc/FLAG3d63dacab
[2020-12-23 16:54:00,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bbbcb532e/65655c0452ee49ecbc36cb7263d2d6cc
[2020-12-23 16:54:00,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-12-23 16:54:00,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2020-12-23 16:54:00,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-12-23 16:54:00,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-12-23 16:54:00,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-12-23 16:54:00,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:54:00" (1/1) ...
[2020-12-23 16:54:00,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc66ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:00, skipping insertion in model container
[2020-12-23 16:54:00,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:54:00" (1/1) ...
[2020-12-23 16:54:00,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-12-23 16:54:00,590 INFO L178 MainTranslator]: Built tables and reachable declarations
left hand side expression in assignment: lhs: VariableLHS[~length1~0,<LOCAL,main>]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],offset],IdentifierExpression[~i~0,<LOCAL,main>]]]]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,<LOCAL,main>],IntegerLiteral[1]]]]]
[2020-12-23 16:54:00,888 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-12-23 16:54:00,899 INFO L203 MainTranslator]: Completed pre-run
left hand side expression in assignment: lhs: VariableLHS[~length1~0,<LOCAL,main>]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],offset],IdentifierExpression[~i~0,<LOCAL,main>]]]]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,<LOCAL,main>],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,<LOCAL,main>],IntegerLiteral[1]]]]]
[2020-12-23 16:54:00,949 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-12-23 16:54:01,014 INFO L208 MainTranslator]: Completed translation
[2020-12-23 16:54:01,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01 WrapperNode
[2020-12-23 16:54:01,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-12-23 16:54:01,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-12-23 16:54:01,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-12-23 16:54:01,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2020-12-23 16:54:01,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-12-23 16:54:01,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-12-23 16:54:01,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-12-23 16:54:01,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-12-23 16:54:01,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (1/1) ...
[2020-12-23 16:54:01,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-12-23 16:54:01,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-12-23 16:54:01,100 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-12-23 16:54:01,100 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-12-23 16:54:01,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (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 16:54:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-12-23 16:54:01,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-12-23 16:54:01,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-12-23 16:54:01,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-12-23 16:54:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec
[2020-12-23 16:54:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec
[2020-12-23 16:54:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-12-23 16:54:01,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-12-23 16:54:01,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-12-23 16:54:01,886 INFO L299 CfgBuilder]: Removed 5 assume(true) statements.
[2020-12-23 16:54:01,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:01 BoogieIcfgContainer
[2020-12-23 16:54:01,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-12-23 16:54:01,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-12-23 16:54:01,891 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-12-23 16:54:01,895 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-12-23 16:54:01,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:54:00" (1/3) ...
[2020-12-23 16:54:01,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe48261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:54:01, skipping insertion in model container
[2020-12-23 16:54:01,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:54:01" (2/3) ...
[2020-12-23 16:54:01,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe48261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:54:01, skipping insertion in model container
[2020-12-23 16:54:01,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:01" (3/3) ...
[2020-12-23 16:54:01,899 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i
[2020-12-23 16:54:01,907 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-12-23 16:54:01,913 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations.
[2020-12-23 16:54:01,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations.
[2020-12-23 16:54:01,963 INFO L377 AbstractCegarLoop]: Interprodecural is true
[2020-12-23 16:54:01,963 INFO L378 AbstractCegarLoop]: Hoare is false
[2020-12-23 16:54:01,964 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-12-23 16:54:01,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-12-23 16:54:01,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-12-23 16:54:01,964 INFO L382 AbstractCegarLoop]: Difference is false
[2020-12-23 16:54:01,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-12-23 16:54:01,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-12-23 16:54:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states.
[2020-12-23 16:54:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 16:54:01,990 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:01,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:01,991 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times
[2020-12-23 16:54:02,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:02,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188765275]
[2020-12-23 16:54:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:02,222 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 16:54:02,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188765275]
[2020-12-23 16:54:02,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:02,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-12-23 16:54:02,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611861334]
[2020-12-23 16:54:02,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 16:54:02,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 16:54:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-12-23 16:54:02,255 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states.
[2020-12-23 16:54:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:02,325 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions.
[2020-12-23 16:54:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-12-23 16:54:02,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6
[2020-12-23 16:54:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:02,337 INFO L225 Difference]: With dead ends: 39
[2020-12-23 16:54:02,338 INFO L226 Difference]: Without dead ends: 35
[2020-12-23 16:54:02,340 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 16:54:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-12-23 16:54:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28.
[2020-12-23 16:54:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-12-23 16:54:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2020-12-23 16:54:02,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6
[2020-12-23 16:54:02,386 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:02,386 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2020-12-23 16:54:02,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 16:54:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2020-12-23 16:54:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 16:54:02,387 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:02,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:02,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-12-23 16:54:02,388 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times
[2020-12-23 16:54:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:02,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093784047]
[2020-12-23 16:54:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:02,433 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 16:54:02,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093784047]
[2020-12-23 16:54:02,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:02,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-12-23 16:54:02,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983113784]
[2020-12-23 16:54:02,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-12-23 16:54:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-12-23 16:54:02,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 16:54:02,438 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 3 states.
[2020-12-23 16:54:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:02,464 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions.
[2020-12-23 16:54:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-12-23 16:54:02,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2020-12-23 16:54:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:02,466 INFO L225 Difference]: With dead ends: 26
[2020-12-23 16:54:02,466 INFO L226 Difference]: Without dead ends: 26
[2020-12-23 16:54:02,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:54:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-12-23 16:54:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2020-12-23 16:54:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-12-23 16:54:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions.
[2020-12-23 16:54:02,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6
[2020-12-23 16:54:02,472 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:02,472 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions.
[2020-12-23 16:54:02,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-12-23 16:54:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions.
[2020-12-23 16:54:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 16:54:02,473 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:02,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:02,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-12-23 16:54:02,474 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times
[2020-12-23 16:54:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:02,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769550910]
[2020-12-23 16:54:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:02,567 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 16:54:02,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769550910]
[2020-12-23 16:54:02,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:02,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-12-23 16:54:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080647632]
[2020-12-23 16:54:02,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 16:54:02,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 16:54:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-12-23 16:54:02,574 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states.
[2020-12-23 16:54:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:02,619 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions.
[2020-12-23 16:54:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-12-23 16:54:02,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6
[2020-12-23 16:54:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:02,623 INFO L225 Difference]: With dead ends: 25
[2020-12-23 16:54:02,623 INFO L226 Difference]: Without dead ends: 25
[2020-12-23 16:54:02,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-12-23 16:54:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-12-23 16:54:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-12-23 16:54:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-12-23 16:54:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2020-12-23 16:54:02,643 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6
[2020-12-23 16:54:02,644 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:02,645 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2020-12-23 16:54:02,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 16:54:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2020-12-23 16:54:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 16:54:02,651 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:02,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:02,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-12-23 16:54:02,652 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times
[2020-12-23 16:54:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955210339]
[2020-12-23 16:54:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:02,729 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 16:54:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955210339]
[2020-12-23 16:54:02,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:02,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-12-23 16:54:02,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136416174]
[2020-12-23 16:54:02,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-12-23 16:54:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-12-23 16:54:02,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-12-23 16:54:02,733 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states.
[2020-12-23 16:54:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:02,792 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions.
[2020-12-23 16:54:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-12-23 16:54:02,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6
[2020-12-23 16:54:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:02,794 INFO L225 Difference]: With dead ends: 34
[2020-12-23 16:54:02,794 INFO L226 Difference]: Without dead ends: 34
[2020-12-23 16:54:02,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-12-23 16:54:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-12-23 16:54:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27.
[2020-12-23 16:54:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-12-23 16:54:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions.
[2020-12-23 16:54:02,801 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6
[2020-12-23 16:54:02,801 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:02,801 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions.
[2020-12-23 16:54:02,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-12-23 16:54:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions.
[2020-12-23 16:54:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2020-12-23 16:54:02,806 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:02,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:02,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-12-23 16:54:02,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -590943170, now seen corresponding path program 1 times
[2020-12-23 16:54:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:02,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587671464]
[2020-12-23 16:54:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:02,901 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 16:54:02,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587671464]
[2020-12-23 16:54:02,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:02,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-12-23 16:54:02,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181863779]
[2020-12-23 16:54:02,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-12-23 16:54:02,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-12-23 16:54:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-12-23 16:54:02,910 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states.
[2020-12-23 16:54:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:03,018 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions.
[2020-12-23 16:54:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-12-23 16:54:03,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9
[2020-12-23 16:54:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:03,022 INFO L225 Difference]: With dead ends: 26
[2020-12-23 16:54:03,023 INFO L226 Difference]: Without dead ends: 26
[2020-12-23 16:54:03,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-12-23 16:54:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-12-23 16:54:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2020-12-23 16:54:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-12-23 16:54:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2020-12-23 16:54:03,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9
[2020-12-23 16:54:03,037 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:03,037 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2020-12-23 16:54:03,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-12-23 16:54:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2020-12-23 16:54:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2020-12-23 16:54:03,038 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:03,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:03,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-12-23 16:54:03,039 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash -590943169, now seen corresponding path program 1 times
[2020-12-23 16:54:03,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:03,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398241291]
[2020-12-23 16:54:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:03,189 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 16:54:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398241291]
[2020-12-23 16:54:03,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:03,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-12-23 16:54:03,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736442330]
[2020-12-23 16:54:03,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-12-23 16:54:03,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-12-23 16:54:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-12-23 16:54:03,193 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states.
[2020-12-23 16:54:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:03,325 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions.
[2020-12-23 16:54:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-12-23 16:54:03,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9
[2020-12-23 16:54:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:03,330 INFO L225 Difference]: With dead ends: 33
[2020-12-23 16:54:03,330 INFO L226 Difference]: Without dead ends: 33
[2020-12-23 16:54:03,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-12-23 16:54:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-12-23 16:54:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2020-12-23 16:54:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-12-23 16:54:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions.
[2020-12-23 16:54:03,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9
[2020-12-23 16:54:03,344 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:03,344 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions.
[2020-12-23 16:54:03,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-12-23 16:54:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions.
[2020-12-23 16:54:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-12-23 16:54:03,345 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:03,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:03,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-12-23 16:54:03,347 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times
[2020-12-23 16:54:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:03,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112614987]
[2020-12-23 16:54:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112614987]
[2020-12-23 16:54:03,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997432421]
[2020-12-23 16:54:03,496 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 16:54:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-12-23 16:54:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:03,631 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:54:03,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:03,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:03,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:03,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:54:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:03,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:03,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5
[2020-12-23 16:54:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897527942]
[2020-12-23 16:54:03,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-12-23 16:54:03,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:03,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-12-23 16:54:03,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-12-23 16:54:03,697 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states.
[2020-12-23 16:54:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:03,787 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions.
[2020-12-23 16:54:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-12-23 16:54:03,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10
[2020-12-23 16:54:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:03,789 INFO L225 Difference]: With dead ends: 39
[2020-12-23 16:54:03,789 INFO L226 Difference]: Without dead ends: 39
[2020-12-23 16:54:03,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2020-12-23 16:54:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-12-23 16:54:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30.
[2020-12-23 16:54:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-12-23 16:54:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions.
[2020-12-23 16:54:03,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10
[2020-12-23 16:54:03,802 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:03,802 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions.
[2020-12-23 16:54:03,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-12-23 16:54:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions.
[2020-12-23 16:54:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-12-23 16:54:03,803 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:03,803 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:04,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2020-12-23 16:54:04,017 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 182504998, now seen corresponding path program 1 times
[2020-12-23 16:54:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:04,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875328956]
[2020-12-23 16:54:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875328956]
[2020-12-23 16:54:04,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:04,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-12-23 16:54:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155669518]
[2020-12-23 16:54:04,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-12-23 16:54:04,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-12-23 16:54:04,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-12-23 16:54:04,130 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states.
[2020-12-23 16:54:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:04,222 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions.
[2020-12-23 16:54:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-12-23 16:54:04,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13
[2020-12-23 16:54:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:04,223 INFO L225 Difference]: With dead ends: 40
[2020-12-23 16:54:04,224 INFO L226 Difference]: Without dead ends: 40
[2020-12-23 16:54:04,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-12-23 16:54:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-12-23 16:54:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37.
[2020-12-23 16:54:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-12-23 16:54:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions.
[2020-12-23 16:54:04,229 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 13
[2020-12-23 16:54:04,229 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:04,229 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions.
[2020-12-23 16:54:04,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-12-23 16:54:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions.
[2020-12-23 16:54:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-12-23 16:54:04,230 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:04,231 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:04,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-12-23 16:54:04,231 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash 883569576, now seen corresponding path program 1 times
[2020-12-23 16:54:04,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:04,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131463443]
[2020-12-23 16:54:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:04,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131463443]
[2020-12-23 16:54:04,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:04,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-12-23 16:54:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523453069]
[2020-12-23 16:54:04,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-12-23 16:54:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-12-23 16:54:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-12-23 16:54:04,374 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states.
[2020-12-23 16:54:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:04,521 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions.
[2020-12-23 16:54:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-12-23 16:54:04,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13
[2020-12-23 16:54:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:04,524 INFO L225 Difference]: With dead ends: 51
[2020-12-23 16:54:04,525 INFO L226 Difference]: Without dead ends: 51
[2020-12-23 16:54:04,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2020-12-23 16:54:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2020-12-23 16:54:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38.
[2020-12-23 16:54:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-12-23 16:54:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions.
[2020-12-23 16:54:04,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 13
[2020-12-23 16:54:04,531 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:04,531 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions.
[2020-12-23 16:54:04,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-12-23 16:54:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions.
[2020-12-23 16:54:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-12-23 16:54:04,532 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:04,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:04,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-12-23 16:54:04,533 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1361686065, now seen corresponding path program 1 times
[2020-12-23 16:54:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:04,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270459430]
[2020-12-23 16:54:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2020-12-23 16:54:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,598 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 16:54:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270459430]
[2020-12-23 16:54:04,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 16:54:04,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-12-23 16:54:04,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215756156]
[2020-12-23 16:54:04,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 16:54:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 16:54:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-12-23 16:54:04,604 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 4 states.
[2020-12-23 16:54:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:04,628 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions.
[2020-12-23 16:54:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-12-23 16:54:04,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14
[2020-12-23 16:54:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:04,630 INFO L225 Difference]: With dead ends: 37
[2020-12-23 16:54:04,630 INFO L226 Difference]: Without dead ends: 20
[2020-12-23 16:54:04,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-12-23 16:54:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2020-12-23 16:54:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2020-12-23 16:54:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-12-23 16:54:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2020-12-23 16:54:04,634 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14
[2020-12-23 16:54:04,634 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:04,634 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2020-12-23 16:54:04,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 16:54:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2020-12-23 16:54:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-12-23 16:54:04,635 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:04,635 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:04,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-12-23 16:54:04,636 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash 312590597, now seen corresponding path program 1 times
[2020-12-23 16:54:04,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:04,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418352079]
[2020-12-23 16:54:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:04,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418352079]
[2020-12-23 16:54:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631764742]
[2020-12-23 16:54:04,829 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
[2020-12-23 16:54:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-12-23 16:54:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:05,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:05,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15
[2020-12-23 16:54:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860369855]
[2020-12-23 16:54:05,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-12-23 16:54:05,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-12-23 16:54:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240
[2020-12-23 16:54:05,097 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 16 states.
[2020-12-23 16:54:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:05,280 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions.
[2020-12-23 16:54:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-12-23 16:54:05,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17
[2020-12-23 16:54:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:05,281 INFO L225 Difference]: With dead ends: 27
[2020-12-23 16:54:05,281 INFO L226 Difference]: Without dead ends: 27
[2020-12-23 16:54:05,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342
[2020-12-23 16:54:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-12-23 16:54:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22.
[2020-12-23 16:54:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-12-23 16:54:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions.
[2020-12-23 16:54:05,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17
[2020-12-23 16:54:05,292 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:05,293 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions.
[2020-12-23 16:54:05,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-12-23 16:54:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions.
[2020-12-23 16:54:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-12-23 16:54:05,295 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:05,295 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:05,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:05,509 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:05,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2048380908, now seen corresponding path program 2 times
[2020-12-23 16:54:05,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:05,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600220815]
[2020-12-23 16:54:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600220815]
[2020-12-23 16:54:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661436853]
[2020-12-23 16:54:05,869 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
[2020-12-23 16:54:05,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-12-23 16:54:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 36 conjunts are in the unsatisfiable core
[2020-12-23 16:54:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:06,008 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 14 treesize of output 10
[2020-12-23 16:54:06,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:06,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:06,024 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:06,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21
[2020-12-23 16:54:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver
[2020-12-23 16:54:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver
[2020-12-23 16:54:06,510 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:06,511 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22
[2020-12-23 16:54:06,516 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:54:06,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:06,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-12-23 16:54:06,542 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-12-23 16:54:06,547 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 16:54:06,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:27
[2020-12-23 16:54:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:06,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:06,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25
[2020-12-23 16:54:06,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677299382]
[2020-12-23 16:54:06,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states
[2020-12-23 16:54:06,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2020-12-23 16:54:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600
[2020-12-23 16:54:06,748 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 25 states.
[2020-12-23 16:54:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:08,417 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions.
[2020-12-23 16:54:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2020-12-23 16:54:08,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 21
[2020-12-23 16:54:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:08,418 INFO L225 Difference]: With dead ends: 44
[2020-12-23 16:54:08,419 INFO L226 Difference]: Without dead ends: 35
[2020-12-23 16:54:08,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070
[2020-12-23 16:54:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-12-23 16:54:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30.
[2020-12-23 16:54:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-12-23 16:54:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions.
[2020-12-23 16:54:08,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21
[2020-12-23 16:54:08,423 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:08,423 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions.
[2020-12-23 16:54:08,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states.
[2020-12-23 16:54:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions.
[2020-12-23 16:54:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-12-23 16:54:08,424 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:08,424 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:08,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2020-12-23 16:54:08,635 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2083749168, now seen corresponding path program 3 times
[2020-12-23 16:54:08,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897824993]
[2020-12-23 16:54:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:08,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897824993]
[2020-12-23 16:54:08,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194731652]
[2020-12-23 16:54:08,889 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
[2020-12-23 16:54:08,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2020-12-23 16:54:08,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 37 conjunts are in the unsatisfiable core
[2020-12-23 16:54:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:09,159 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 14 treesize of output 10
[2020-12-23 16:54:09,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:09,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:09,171 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:09,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:54:09,385 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:54:09,386 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:09,389 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:09,389 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 16:54:09,389 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:54:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:09,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23
[2020-12-23 16:54:09,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368285390]
[2020-12-23 16:54:09,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-12-23 16:54:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-12-23 16:54:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506
[2020-12-23 16:54:09,400 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states.
[2020-12-23 16:54:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:09,888 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions.
[2020-12-23 16:54:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-12-23 16:54:09,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29
[2020-12-23 16:54:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:09,889 INFO L225 Difference]: With dead ends: 50
[2020-12-23 16:54:09,891 INFO L226 Difference]: Without dead ends: 37
[2020-12-23 16:54:09,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870
[2020-12-23 16:54:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-12-23 16:54:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34.
[2020-12-23 16:54:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-12-23 16:54:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions.
[2020-12-23 16:54:09,899 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29
[2020-12-23 16:54:09,899 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:09,899 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions.
[2020-12-23 16:54:09,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-12-23 16:54:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions.
[2020-12-23 16:54:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-12-23 16:54:09,903 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:09,903 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:10,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:10,120 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1764143245, now seen corresponding path program 4 times
[2020-12-23 16:54:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:10,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039518707]
[2020-12-23 16:54:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039518707]
[2020-12-23 16:54:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560201954]
[2020-12-23 16:54:10,444 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
[2020-12-23 16:54:10,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-12-23 16:54:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 47 conjunts are in the unsatisfiable core
[2020-12-23 16:54:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:10,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:54:10,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:10,549 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:10,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:10,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:54:10,667 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 16 treesize of output 12
[2020-12-23 16:54:10,668 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:10,675 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:10,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:10,676 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23
[2020-12-23 16:54:11,062 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:11,063 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:54:11,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:54:11,078 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:11,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:11,080 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24
[2020-12-23 16:54:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:11,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:11,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28
[2020-12-23 16:54:11,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082256792]
[2020-12-23 16:54:11,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states
[2020-12-23 16:54:11,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:11,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2020-12-23 16:54:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812
[2020-12-23 16:54:11,308 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 29 states.
[2020-12-23 16:54:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:12,421 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions.
[2020-12-23 16:54:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2020-12-23 16:54:12,422 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33
[2020-12-23 16:54:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:12,423 INFO L225 Difference]: With dead ends: 40
[2020-12-23 16:54:12,423 INFO L226 Difference]: Without dead ends: 40
[2020-12-23 16:54:12,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560
[2020-12-23 16:54:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-12-23 16:54:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38.
[2020-12-23 16:54:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-12-23 16:54:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions.
[2020-12-23 16:54:12,429 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33
[2020-12-23 16:54:12,429 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:12,429 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions.
[2020-12-23 16:54:12,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states.
[2020-12-23 16:54:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions.
[2020-12-23 16:54:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-12-23 16:54:12,430 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:12,430 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:12,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2020-12-23 16:54:12,645 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 503954292, now seen corresponding path program 5 times
[2020-12-23 16:54:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960555728]
[2020-12-23 16:54:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:12,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960555728]
[2020-12-23 16:54:12,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310641034]
[2020-12-23 16:54:12,978 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
[2020-12-23 16:54:13,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2020-12-23 16:54:13,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core
[2020-12-23 16:54:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:13,292 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 14 treesize of output 10
[2020-12-23 16:54:13,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:13,301 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:13,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:13,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:54:13,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:54:13,538 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:13,540 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:13,540 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 16:54:13,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:54:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:13,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:13,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27
[2020-12-23 16:54:13,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274045914]
[2020-12-23 16:54:13,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states
[2020-12-23 16:54:13,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2020-12-23 16:54:13,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702
[2020-12-23 16:54:13,550 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 27 states.
[2020-12-23 16:54:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:14,186 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions.
[2020-12-23 16:54:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-12-23 16:54:14,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37
[2020-12-23 16:54:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:14,187 INFO L225 Difference]: With dead ends: 62
[2020-12-23 16:54:14,187 INFO L226 Difference]: Without dead ends: 45
[2020-12-23 16:54:14,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190
[2020-12-23 16:54:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2020-12-23 16:54:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42.
[2020-12-23 16:54:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-12-23 16:54:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions.
[2020-12-23 16:54:14,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37
[2020-12-23 16:54:14,191 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:14,192 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions.
[2020-12-23 16:54:14,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states.
[2020-12-23 16:54:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions.
[2020-12-23 16:54:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-12-23 16:54:14,193 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:14,193 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:14,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:14,408 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:14,409 INFO L82 PathProgramCache]: Analyzing trace with hash -420068911, now seen corresponding path program 6 times
[2020-12-23 16:54:14,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:14,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598108820]
[2020-12-23 16:54:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:14,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598108820]
[2020-12-23 16:54:14,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357951597]
[2020-12-23 16:54:14,794 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
[2020-12-23 16:54:14,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2020-12-23 16:54:14,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 44 conjunts are in the unsatisfiable core
[2020-12-23 16:54:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:14,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:54:14,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:14,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:14,912 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:14,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:54:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:15,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:15,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33
[2020-12-23 16:54:15,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876983980]
[2020-12-23 16:54:15,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states
[2020-12-23 16:54:15,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2020-12-23 16:54:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122
[2020-12-23 16:54:15,502 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 34 states.
[2020-12-23 16:54:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:16,551 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions.
[2020-12-23 16:54:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2020-12-23 16:54:16,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41
[2020-12-23 16:54:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:16,553 INFO L225 Difference]: With dead ends: 48
[2020-12-23 16:54:16,553 INFO L226 Difference]: Without dead ends: 48
[2020-12-23 16:54:16,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892
[2020-12-23 16:54:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-12-23 16:54:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46.
[2020-12-23 16:54:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-12-23 16:54:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions.
[2020-12-23 16:54:16,557 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41
[2020-12-23 16:54:16,558 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:16,558 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions.
[2020-12-23 16:54:16,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states.
[2020-12-23 16:54:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions.
[2020-12-23 16:54:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2020-12-23 16:54:16,559 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:16,559 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:16,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2020-12-23 16:54:16,773 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash 459737784, now seen corresponding path program 7 times
[2020-12-23 16:54:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:16,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027911690]
[2020-12-23 16:54:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:17,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027911690]
[2020-12-23 16:54:17,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556120605]
[2020-12-23 16:54:17,186 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 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 16:54:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 57 conjunts are in the unsatisfiable core
[2020-12-23 16:54:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:17,551 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 14 treesize of output 10
[2020-12-23 16:54:17,552 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:17,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:17,561 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:17,562 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:54:17,837 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:54:17,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:17,840 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:17,840 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 16:54:17,841 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:54:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:17,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:17,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31
[2020-12-23 16:54:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795224620]
[2020-12-23 16:54:17,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states
[2020-12-23 16:54:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2020-12-23 16:54:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930
[2020-12-23 16:54:17,852 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 31 states.
[2020-12-23 16:54:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:18,869 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions.
[2020-12-23 16:54:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-12-23 16:54:18,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 45
[2020-12-23 16:54:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:18,870 INFO L225 Difference]: With dead ends: 74
[2020-12-23 16:54:18,870 INFO L226 Difference]: Without dead ends: 53
[2020-12-23 16:54:18,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560
[2020-12-23 16:54:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-12-23 16:54:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50.
[2020-12-23 16:54:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-12-23 16:54:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions.
[2020-12-23 16:54:18,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45
[2020-12-23 16:54:18,876 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:18,876 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions.
[2020-12-23 16:54:18,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states.
[2020-12-23 16:54:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions.
[2020-12-23 16:54:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2020-12-23 16:54:18,877 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:18,877 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:19,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2020-12-23 16:54:19,091 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:19,092 INFO L82 PathProgramCache]: Analyzing trace with hash -414587883, now seen corresponding path program 8 times
[2020-12-23 16:54:19,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:19,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064730221]
[2020-12-23 16:54:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:19,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064730221]
[2020-12-23 16:54:19,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138467943]
[2020-12-23 16:54:19,512 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 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 16:54:19,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-12-23 16:54:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core
[2020-12-23 16:54:19,597 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:19,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:19,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 30
[2020-12-23 16:54:19,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052457570]
[2020-12-23 16:54:19,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states
[2020-12-23 16:54:19,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2020-12-23 16:54:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930
[2020-12-23 16:54:19,999 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 31 states.
[2020-12-23 16:54:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:20,740 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions.
[2020-12-23 16:54:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-12-23 16:54:20,741 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49
[2020-12-23 16:54:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:20,742 INFO L225 Difference]: With dead ends: 56
[2020-12-23 16:54:20,743 INFO L226 Difference]: Without dead ends: 56
[2020-12-23 16:54:20,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406
[2020-12-23 16:54:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2020-12-23 16:54:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54.
[2020-12-23 16:54:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-12-23 16:54:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions.
[2020-12-23 16:54:20,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49
[2020-12-23 16:54:20,748 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:20,748 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions.
[2020-12-23 16:54:20,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states.
[2020-12-23 16:54:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions.
[2020-12-23 16:54:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-12-23 16:54:20,749 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:20,749 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:20,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2020-12-23 16:54:20,958 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1462244612, now seen corresponding path program 9 times
[2020-12-23 16:54:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:20,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448435388]
[2020-12-23 16:54:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:21,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448435388]
[2020-12-23 16:54:21,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168082715]
[2020-12-23 16:54:21,588 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 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 16:54:21,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-12-23 16:54:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 67 conjunts are in the unsatisfiable core
[2020-12-23 16:54:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:22,031 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 14 treesize of output 10
[2020-12-23 16:54:22,032 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:22,038 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:22,040 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:22,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:54:22,356 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:54:22,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:22,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:22,360 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 16:54:22,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:54:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:22,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:22,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35
[2020-12-23 16:54:22,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585144694]
[2020-12-23 16:54:22,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states
[2020-12-23 16:54:22,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2020-12-23 16:54:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190
[2020-12-23 16:54:22,374 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 35 states.
[2020-12-23 16:54:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:23,435 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions.
[2020-12-23 16:54:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2020-12-23 16:54:23,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53
[2020-12-23 16:54:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:23,436 INFO L225 Difference]: With dead ends: 86
[2020-12-23 16:54:23,437 INFO L226 Difference]: Without dead ends: 61
[2020-12-23 16:54:23,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980
[2020-12-23 16:54:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2020-12-23 16:54:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58.
[2020-12-23 16:54:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-12-23 16:54:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions.
[2020-12-23 16:54:23,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53
[2020-12-23 16:54:23,441 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:23,441 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions.
[2020-12-23 16:54:23,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states.
[2020-12-23 16:54:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions.
[2020-12-23 16:54:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2020-12-23 16:54:23,442 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:23,442 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:23,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:23,654 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1370363737, now seen corresponding path program 10 times
[2020-12-23 16:54:23,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:23,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654975851]
[2020-12-23 16:54:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:24,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654975851]
[2020-12-23 16:54:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633250094]
[2020-12-23 16:54:24,232 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 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 16:54:24,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-12-23 16:54:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 74 conjunts are in the unsatisfiable core
[2020-12-23 16:54:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:24,326 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:54:24,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:24,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:24,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:24,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:54:24,476 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 16 treesize of output 12
[2020-12-23 16:54:24,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:24,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:24,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:24,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23
[2020-12-23 16:54:25,526 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:25,527 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:54:25,528 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:54:25,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:25,544 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:25,545 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24
[2020-12-23 16:54:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 50 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:25,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:25,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 43
[2020-12-23 16:54:25,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880877577]
[2020-12-23 16:54:25,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states
[2020-12-23 16:54:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants.
[2020-12-23 16:54:25,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1784, Unknown=0, NotChecked=0, Total=1892
[2020-12-23 16:54:25,932 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 44 states.
[2020-12-23 16:54:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:28,561 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions.
[2020-12-23 16:54:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states.
[2020-12-23 16:54:28,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 57
[2020-12-23 16:54:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:28,563 INFO L225 Difference]: With dead ends: 64
[2020-12-23 16:54:28,563 INFO L226 Difference]: Without dead ends: 64
[2020-12-23 16:54:28,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=229, Invalid=3431, Unknown=0, NotChecked=0, Total=3660
[2020-12-23 16:54:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states.
[2020-12-23 16:54:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62.
[2020-12-23 16:54:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-12-23 16:54:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions.
[2020-12-23 16:54:28,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57
[2020-12-23 16:54:28,568 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:28,568 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions.
[2020-12-23 16:54:28,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states.
[2020-12-23 16:54:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions.
[2020-12-23 16:54:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2020-12-23 16:54:28,569 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:28,569 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:28,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:28,781 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash 329833536, now seen corresponding path program 11 times
[2020-12-23 16:54:28,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:28,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366324317]
[2020-12-23 16:54:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366324317]
[2020-12-23 16:54:29,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529555135]
[2020-12-23 16:54:29,443 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:29,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-12-23 16:54:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 77 conjunts are in the unsatisfiable core
[2020-12-23 16:54:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:29,951 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 14 treesize of output 10
[2020-12-23 16:54:29,952 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:29,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:29,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:29,963 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:54:30,321 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:54:30,323 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:30,325 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:30,326 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 16:54:30,326 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:54:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:30,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:30,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39
[2020-12-23 16:54:30,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211660070]
[2020-12-23 16:54:30,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states
[2020-12-23 16:54:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants.
[2020-12-23 16:54:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1392, Unknown=0, NotChecked=0, Total=1482
[2020-12-23 16:54:30,345 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 39 states.
[2020-12-23 16:54:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:31,717 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions.
[2020-12-23 16:54:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states.
[2020-12-23 16:54:31,718 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 61
[2020-12-23 16:54:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:31,719 INFO L225 Difference]: With dead ends: 98
[2020-12-23 16:54:31,719 INFO L226 Difference]: Without dead ends: 69
[2020-12-23 16:54:31,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=2301, Unknown=0, NotChecked=0, Total=2450
[2020-12-23 16:54:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-12-23 16:54:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66.
[2020-12-23 16:54:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-12-23 16:54:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions.
[2020-12-23 16:54:31,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61
[2020-12-23 16:54:31,723 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:31,723 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions.
[2020-12-23 16:54:31,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states.
[2020-12-23 16:54:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions.
[2020-12-23 16:54:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2020-12-23 16:54:31,724 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:31,724 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:31,928 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 644832157, now seen corresponding path program 12 times
[2020-12-23 16:54:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:31,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691968205]
[2020-12-23 16:54:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:32,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691968205]
[2020-12-23 16:54:32,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805934172]
[2020-12-23 16:54:32,611 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:32,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-12-23 16:54:32,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 65 conjunts are in the unsatisfiable core
[2020-12-23 16:54:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:32,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:54:32,747 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:32,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:32,754 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:32,754 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:54:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:34,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:34,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51
[2020-12-23 16:54:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776700940]
[2020-12-23 16:54:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states
[2020-12-23 16:54:34,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants.
[2020-12-23 16:54:34,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2426, Unknown=0, NotChecked=0, Total=2652
[2020-12-23 16:54:34,261 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 52 states.
[2020-12-23 16:54:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:36,432 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions.
[2020-12-23 16:54:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2020-12-23 16:54:36,433 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 65
[2020-12-23 16:54:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:36,434 INFO L225 Difference]: With dead ends: 72
[2020-12-23 16:54:36,434 INFO L226 Difference]: Without dead ends: 72
[2020-12-23 16:54:36,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=409, Invalid=4147, Unknown=0, NotChecked=0, Total=4556
[2020-12-23 16:54:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-12-23 16:54:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70.
[2020-12-23 16:54:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-12-23 16:54:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions.
[2020-12-23 16:54:36,439 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65
[2020-12-23 16:54:36,439 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:36,439 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions.
[2020-12-23 16:54:36,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states.
[2020-12-23 16:54:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions.
[2020-12-23 16:54:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2020-12-23 16:54:36,441 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:36,441 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:36,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21
[2020-12-23 16:54:36,651 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1642487428, now seen corresponding path program 13 times
[2020-12-23 16:54:36,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118073862]
[2020-12-23 16:54:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:37,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118073862]
[2020-12-23 16:54:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689871368]
[2020-12-23 16:54:37,549 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 87 conjunts are in the unsatisfiable core
[2020-12-23 16:54:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:38,062 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 14 treesize of output 10
[2020-12-23 16:54:38,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:38,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:38,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:38,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21
[2020-12-23 16:54:40,538 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:40,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18
[2020-12-23 16:54:40,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:54:40,558 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:40,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-12-23 16:54:40,564 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-12-23 16:54:40,566 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 16:54:40,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27
[2020-12-23 16:54:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 66 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:41,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:41,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 60
[2020-12-23 16:54:41,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628305679]
[2020-12-23 16:54:41,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states
[2020-12-23 16:54:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants.
[2020-12-23 16:54:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3368, Unknown=0, NotChecked=0, Total=3540
[2020-12-23 16:54:41,081 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 60 states.
[2020-12-23 16:54:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:54:54,223 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions.
[2020-12-23 16:54:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states.
[2020-12-23 16:54:54,224 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 69
[2020-12-23 16:54:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:54:54,225 INFO L225 Difference]: With dead ends: 116
[2020-12-23 16:54:54,225 INFO L226 Difference]: Without dead ends: 83
[2020-12-23 16:54:54,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=419, Invalid=8508, Unknown=3, NotChecked=0, Total=8930
[2020-12-23 16:54:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-12-23 16:54:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78.
[2020-12-23 16:54:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-12-23 16:54:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions.
[2020-12-23 16:54:54,230 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69
[2020-12-23 16:54:54,231 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:54:54,231 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions.
[2020-12-23 16:54:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states.
[2020-12-23 16:54:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions.
[2020-12-23 16:54:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2020-12-23 16:54:54,235 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:54:54,235 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:54:54,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:54,437 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:54:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:54:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash -228789816, now seen corresponding path program 14 times
[2020-12-23 16:54:54,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:54:54,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593445836]
[2020-12-23 16:54:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:54:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:54:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:55,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593445836]
[2020-12-23 16:54:55,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312974500]
[2020-12-23 16:54:55,593 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:54:55,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-12-23 16:54:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:54:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 96 conjunts are in the unsatisfiable core
[2020-12-23 16:54:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:54:56,254 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 14 treesize of output 10
[2020-12-23 16:54:56,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:54:56,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:56,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:54:56,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21
[2020-12-23 16:54:59,269 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:59,270 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 18 treesize of output 18
[2020-12-23 16:54:59,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:54:59,292 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:54:59,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-12-23 16:54:59,296 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-12-23 16:54:59,299 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 16:54:59,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27
[2020-12-23 16:54:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:54:59,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:54:59,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66
[2020-12-23 16:54:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011027892]
[2020-12-23 16:54:59,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states
[2020-12-23 16:54:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:54:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants.
[2020-12-23 16:54:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4091, Unknown=0, NotChecked=0, Total=4290
[2020-12-23 16:54:59,866 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 66 states.
[2020-12-23 16:55:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:55:18,113 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions.
[2020-12-23 16:55:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states.
[2020-12-23 16:55:18,114 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 77
[2020-12-23 16:55:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:55:18,115 INFO L225 Difference]: With dead ends: 128
[2020-12-23 16:55:18,116 INFO L226 Difference]: Without dead ends: 91
[2020-12-23 16:55:18,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=468, Invalid=10243, Unknown=1, NotChecked=0, Total=10712
[2020-12-23 16:55:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-12-23 16:55:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86.
[2020-12-23 16:55:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-12-23 16:55:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions.
[2020-12-23 16:55:18,122 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 77
[2020-12-23 16:55:18,123 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:55:18,123 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions.
[2020-12-23 16:55:18,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states.
[2020-12-23 16:55:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions.
[2020-12-23 16:55:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2020-12-23 16:55:18,124 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:55:18,124 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:55:18,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23
[2020-12-23 16:55:18,339 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:55:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:55:18,340 INFO L82 PathProgramCache]: Analyzing trace with hash 479794700, now seen corresponding path program 15 times
[2020-12-23 16:55:18,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:55:18,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396649577]
[2020-12-23 16:55:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:55:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:19,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396649577]
[2020-12-23 16:55:19,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59040262]
[2020-12-23 16:55:19,781 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s)
[2020-12-23 16:55:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:55:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 107 conjunts are in the unsatisfiable core
[2020-12-23 16:55:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:55:20,829 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 14 treesize of output 10
[2020-12-23 16:55:20,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:20,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:20,839 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:55:20,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:55:21,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:55:21,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:21,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:21,324 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 16:55:21,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:55:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:21,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:55:21,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 51
[2020-12-23 16:55:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632512283]
[2020-12-23 16:55:21,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states
[2020-12-23 16:55:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:55:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants.
[2020-12-23 16:55:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2433, Unknown=0, NotChecked=0, Total=2550
[2020-12-23 16:55:21,351 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 51 states.
[2020-12-23 16:55:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:55:24,559 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions.
[2020-12-23 16:55:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states.
[2020-12-23 16:55:24,560 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 85
[2020-12-23 16:55:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:55:24,561 INFO L225 Difference]: With dead ends: 134
[2020-12-23 16:55:24,561 INFO L226 Difference]: Without dead ends: 93
[2020-12-23 16:55:24,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160
[2020-12-23 16:55:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-12-23 16:55:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90.
[2020-12-23 16:55:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2020-12-23 16:55:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions.
[2020-12-23 16:55:24,565 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85
[2020-12-23 16:55:24,565 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:55:24,565 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions.
[2020-12-23 16:55:24,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states.
[2020-12-23 16:55:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions.
[2020-12-23 16:55:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2020-12-23 16:55:24,567 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:55:24,567 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:55:24,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:24,773 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:55:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:55:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1189179799, now seen corresponding path program 16 times
[2020-12-23 16:55:24,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:55:24,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616957019]
[2020-12-23 16:55:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:55:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:26,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616957019]
[2020-12-23 16:55:26,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436023279]
[2020-12-23 16:55:26,271 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:26,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-12-23 16:55:26,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:55:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 110 conjunts are in the unsatisfiable core
[2020-12-23 16:55:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:55:26,374 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:55:26,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:26,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:26,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:26,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:55:26,606 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 16 treesize of output 12
[2020-12-23 16:55:26,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:26,616 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:26,617 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:26,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23
[2020-12-23 16:55:29,173 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:29,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:55:29,176 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:55:29,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:29,194 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:29,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24
[2020-12-23 16:55:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 162 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:29,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:55:29,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38] total 63
[2020-12-23 16:55:29,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73758155]
[2020-12-23 16:55:29,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states
[2020-12-23 16:55:29,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:55:29,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants.
[2020-12-23 16:55:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3854, Unknown=0, NotChecked=0, Total=4032
[2020-12-23 16:55:29,807 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 64 states.
[2020-12-23 16:55:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:55:36,304 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions.
[2020-12-23 16:55:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states.
[2020-12-23 16:55:36,306 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 89
[2020-12-23 16:55:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:55:36,307 INFO L225 Difference]: With dead ends: 96
[2020-12-23 16:55:36,307 INFO L226 Difference]: Without dead ends: 96
[2020-12-23 16:55:36,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=359, Invalid=7473, Unknown=0, NotChecked=0, Total=7832
[2020-12-23 16:55:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-12-23 16:55:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94.
[2020-12-23 16:55:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2020-12-23 16:55:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions.
[2020-12-23 16:55:36,312 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89
[2020-12-23 16:55:36,312 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:55:36,312 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions.
[2020-12-23 16:55:36,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states.
[2020-12-23 16:55:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions.
[2020-12-23 16:55:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94
[2020-12-23 16:55:36,313 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:55:36,314 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:55:36,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25
[2020-12-23 16:55:36,530 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:55:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:55:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash -790148272, now seen corresponding path program 17 times
[2020-12-23 16:55:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:55:36,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281311730]
[2020-12-23 16:55:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:55:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281311730]
[2020-12-23 16:55:38,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515864297]
[2020-12-23 16:55:38,211 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:38,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s)
[2020-12-23 16:55:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:55:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 117 conjunts are in the unsatisfiable core
[2020-12-23 16:55:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:55:39,475 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 14 treesize of output 10
[2020-12-23 16:55:39,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:39,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:39,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:55:39,485 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:55:40,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:55:40,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:40,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:40,048 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 16:55:40,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:55:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:40,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:55:40,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 55
[2020-12-23 16:55:40,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976314259]
[2020-12-23 16:55:40,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states
[2020-12-23 16:55:40,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:55:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants.
[2020-12-23 16:55:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2844, Unknown=0, NotChecked=0, Total=2970
[2020-12-23 16:55:40,084 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 55 states.
[2020-12-23 16:55:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:55:44,731 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions.
[2020-12-23 16:55:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states.
[2020-12-23 16:55:44,732 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 93
[2020-12-23 16:55:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:55:44,733 INFO L225 Difference]: With dead ends: 146
[2020-12-23 16:55:44,733 INFO L226 Difference]: Without dead ends: 101
[2020-12-23 16:55:44,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=201, Invalid=4629, Unknown=0, NotChecked=0, Total=4830
[2020-12-23 16:55:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-12-23 16:55:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98.
[2020-12-23 16:55:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-12-23 16:55:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions.
[2020-12-23 16:55:44,738 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93
[2020-12-23 16:55:44,738 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:55:44,738 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions.
[2020-12-23 16:55:44,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states.
[2020-12-23 16:55:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions.
[2020-12-23 16:55:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98
[2020-12-23 16:55:44,739 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:55:44,739 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:55:44,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26
[2020-12-23 16:55:44,950 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:55:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:55:44,951 INFO L82 PathProgramCache]: Analyzing trace with hash 156309165, now seen corresponding path program 18 times
[2020-12-23 16:55:44,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:55:44,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393842281]
[2020-12-23 16:55:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:55:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:46,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393842281]
[2020-12-23 16:55:46,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853247799]
[2020-12-23 16:55:46,649 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:46,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s)
[2020-12-23 16:55:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:55:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 91 conjunts are in the unsatisfiable core
[2020-12-23 16:55:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:55:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 190 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:50,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:55:50,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 76
[2020-12-23 16:55:50,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761004052]
[2020-12-23 16:55:50,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states
[2020-12-23 16:55:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:55:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants.
[2020-12-23 16:55:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=5255, Unknown=0, NotChecked=0, Total=5852
[2020-12-23 16:55:50,304 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 77 states.
[2020-12-23 16:55:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:55:54,233 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions.
[2020-12-23 16:55:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states.
[2020-12-23 16:55:54,234 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 97
[2020-12-23 16:55:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:55:54,235 INFO L225 Difference]: With dead ends: 104
[2020-12-23 16:55:54,236 INFO L226 Difference]: Without dead ends: 104
[2020-12-23 16:55:54,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=837, Invalid=7173, Unknown=0, NotChecked=0, Total=8010
[2020-12-23 16:55:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2020-12-23 16:55:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102.
[2020-12-23 16:55:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states.
[2020-12-23 16:55:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions.
[2020-12-23 16:55:54,241 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97
[2020-12-23 16:55:54,241 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:55:54,241 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions.
[2020-12-23 16:55:54,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states.
[2020-12-23 16:55:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions.
[2020-12-23 16:55:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2020-12-23 16:55:54,242 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:55:54,242 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:55:54,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27
[2020-12-23 16:55:54,448 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:55:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:55:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 945033620, now seen corresponding path program 19 times
[2020-12-23 16:55:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:55:54,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2179554]
[2020-12-23 16:55:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:55:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:56,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2179554]
[2020-12-23 16:55:56,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535343062]
[2020-12-23 16:55:56,883 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:55:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:55:57,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 127 conjunts are in the unsatisfiable core
[2020-12-23 16:55:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:55:58,424 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 14 treesize of output 10
[2020-12-23 16:55:58,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:58,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:58,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:55:58,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:55:59,143 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:55:59,145 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:55:59,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:55:59,149 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 16:55:59,150 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:55:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:55:59,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:55:59,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 59
[2020-12-23 16:55:59,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128248455]
[2020-12-23 16:55:59,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states
[2020-12-23 16:55:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:55:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants.
[2020-12-23 16:55:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3287, Unknown=0, NotChecked=0, Total=3422
[2020-12-23 16:55:59,188 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 59 states.
[2020-12-23 16:56:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:56:04,376 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions.
[2020-12-23 16:56:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2020-12-23 16:56:04,377 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 101
[2020-12-23 16:56:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:56:04,378 INFO L225 Difference]: With dead ends: 158
[2020-12-23 16:56:04,379 INFO L226 Difference]: Without dead ends: 109
[2020-12-23 16:56:04,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=214, Invalid=5336, Unknown=0, NotChecked=0, Total=5550
[2020-12-23 16:56:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-12-23 16:56:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106.
[2020-12-23 16:56:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-12-23 16:56:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions.
[2020-12-23 16:56:04,384 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101
[2020-12-23 16:56:04,385 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:56:04,385 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions.
[2020-12-23 16:56:04,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states.
[2020-12-23 16:56:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions.
[2020-12-23 16:56:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2020-12-23 16:56:04,386 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:56:04,386 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:56:04,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28
[2020-12-23 16:56:04,601 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:56:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:56:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 413085681, now seen corresponding path program 20 times
[2020-12-23 16:56:04,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:56:04,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976395409]
[2020-12-23 16:56:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:56:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:56:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 190 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:06,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976395409]
[2020-12-23 16:56:06,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471690639]
[2020-12-23 16:56:06,627 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:06,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-12-23 16:56:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:56:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 120 conjunts are in the unsatisfiable core
[2020-12-23 16:56:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:56:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:08,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:56:08,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 58
[2020-12-23 16:56:08,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471866387]
[2020-12-23 16:56:08,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states
[2020-12-23 16:56:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:56:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants.
[2020-12-23 16:56:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3100, Unknown=0, NotChecked=0, Total=3422
[2020-12-23 16:56:08,457 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 59 states.
[2020-12-23 16:56:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:56:12,476 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions.
[2020-12-23 16:56:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states.
[2020-12-23 16:56:12,478 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 105
[2020-12-23 16:56:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:56:12,479 INFO L225 Difference]: With dead ends: 112
[2020-12-23 16:56:12,479 INFO L226 Difference]: Without dead ends: 112
[2020-12-23 16:56:12,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=406, Invalid=4850, Unknown=0, NotChecked=0, Total=5256
[2020-12-23 16:56:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-12-23 16:56:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110.
[2020-12-23 16:56:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states.
[2020-12-23 16:56:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions.
[2020-12-23 16:56:12,484 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105
[2020-12-23 16:56:12,484 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:56:12,484 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions.
[2020-12-23 16:56:12,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states.
[2020-12-23 16:56:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions.
[2020-12-23 16:56:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2020-12-23 16:56:12,485 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:56:12,485 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:56:12,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:12,692 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:56:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:56:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1420552408, now seen corresponding path program 21 times
[2020-12-23 16:56:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:56:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583971344]
[2020-12-23 16:56:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:56:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:56:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583971344]
[2020-12-23 16:56:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593566298]
[2020-12-23 16:56:15,436 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:15,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s)
[2020-12-23 16:56:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:56:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 137 conjunts are in the unsatisfiable core
[2020-12-23 16:56:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:56:17,499 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 14 treesize of output 10
[2020-12-23 16:56:17,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:17,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:17,514 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-12-23 16:56:17,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17
[2020-12-23 16:56:18,247 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-12-23 16:56:18,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:18,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:18,255 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 16:56:18,256 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-12-23 16:56:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:56:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 63
[2020-12-23 16:56:18,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344098854]
[2020-12-23 16:56:18,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states
[2020-12-23 16:56:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:56:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants.
[2020-12-23 16:56:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3762, Unknown=0, NotChecked=0, Total=3906
[2020-12-23 16:56:18,313 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 63 states.
[2020-12-23 16:56:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:56:24,538 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions.
[2020-12-23 16:56:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2020-12-23 16:56:24,540 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 109
[2020-12-23 16:56:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:56:24,541 INFO L225 Difference]: With dead ends: 170
[2020-12-23 16:56:24,542 INFO L226 Difference]: Without dead ends: 117
[2020-12-23 16:56:24,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=227, Invalid=6093, Unknown=0, NotChecked=0, Total=6320
[2020-12-23 16:56:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-12-23 16:56:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114.
[2020-12-23 16:56:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states.
[2020-12-23 16:56:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions.
[2020-12-23 16:56:24,548 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109
[2020-12-23 16:56:24,548 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:56:24,548 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions.
[2020-12-23 16:56:24,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states.
[2020-12-23 16:56:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions.
[2020-12-23 16:56:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114
[2020-12-23 16:56:24,549 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:56:24,549 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:56:24,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:24,766 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:56:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:56:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1680516555, now seen corresponding path program 22 times
[2020-12-23 16:56:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:56:24,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293898060]
[2020-12-23 16:56:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:56:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:56:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:27,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293898060]
[2020-12-23 16:56:27,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846999489]
[2020-12-23 16:56:27,537 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:27,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-12-23 16:56:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:56:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 137 conjunts are in the unsatisfiable core
[2020-12-23 16:56:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:56:27,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:56:27,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:27,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:27,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:27,696 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:56:28,087 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 16 treesize of output 12
[2020-12-23 16:56:28,089 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:28,102 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:28,103 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:28,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23
[2020-12-23 16:56:33,183 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:33,184 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:56:33,186 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:56:33,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:33,212 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:33,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24
[2020-12-23 16:56:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 288 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:34,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:56:34,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47] total 78
[2020-12-23 16:56:34,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544933965]
[2020-12-23 16:56:34,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states
[2020-12-23 16:56:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:56:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants.
[2020-12-23 16:56:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=5921, Unknown=0, NotChecked=0, Total=6162
[2020-12-23 16:56:34,210 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 79 states.
[2020-12-23 16:56:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:56:47,367 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions.
[2020-12-23 16:56:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states.
[2020-12-23 16:56:47,369 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 113
[2020-12-23 16:56:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:56:47,370 INFO L225 Difference]: With dead ends: 120
[2020-12-23 16:56:47,370 INFO L226 Difference]: Without dead ends: 120
[2020-12-23 16:56:47,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=467, Invalid=11523, Unknown=0, NotChecked=0, Total=11990
[2020-12-23 16:56:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2020-12-23 16:56:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118.
[2020-12-23 16:56:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states.
[2020-12-23 16:56:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions.
[2020-12-23 16:56:47,375 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113
[2020-12-23 16:56:47,376 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:56:47,376 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions.
[2020-12-23 16:56:47,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states.
[2020-12-23 16:56:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions.
[2020-12-23 16:56:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118
[2020-12-23 16:56:47,377 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:56:47,377 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:56:47,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31
[2020-12-23 16:56:47,582 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:56:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:56:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1602531044, now seen corresponding path program 23 times
[2020-12-23 16:56:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:56:47,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814036320]
[2020-12-23 16:56:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:56:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:56:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:56:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814036320]
[2020-12-23 16:56:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051669267]
[2020-12-23 16:56:51,251 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:56:51,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s)
[2020-12-23 16:56:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:56:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 146 conjunts are in the unsatisfiable core
[2020-12-23 16:56:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:56:51,504 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:56:51,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:51,517 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:51,519 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:51,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12
[2020-12-23 16:56:54,046 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 16 treesize of output 12
[2020-12-23 16:56:54,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:54,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:56:54,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:56:54,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21
[2020-12-23 16:57:01,640 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:01,640 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:57:01,643 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:57:01,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:01,674 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:01,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21
[2020-12-23 16:57:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 276 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:57:03,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:57:03,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95
[2020-12-23 16:57:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485287606]
[2020-12-23 16:57:03,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states
[2020-12-23 16:57:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:57:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants.
[2020-12-23 16:57:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=8663, Unknown=0, NotChecked=0, Total=8930
[2020-12-23 16:57:03,060 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 95 states.
[2020-12-23 16:57:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:57:27,066 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions.
[2020-12-23 16:57:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states.
[2020-12-23 16:57:27,069 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 117
[2020-12-23 16:57:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:57:27,071 INFO L225 Difference]: With dead ends: 188
[2020-12-23 16:57:27,071 INFO L226 Difference]: Without dead ends: 131
[2020-12-23 16:57:27,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=769, Invalid=24671, Unknown=0, NotChecked=0, Total=25440
[2020-12-23 16:57:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2020-12-23 16:57:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126.
[2020-12-23 16:57:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states.
[2020-12-23 16:57:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions.
[2020-12-23 16:57:27,079 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 117
[2020-12-23 16:57:27,080 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:57:27,080 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions.
[2020-12-23 16:57:27,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states.
[2020-12-23 16:57:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions.
[2020-12-23 16:57:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126
[2020-12-23 16:57:27,081 INFO L414 BasicCegarLoop]: Found error trace
[2020-12-23 16:57:27,081 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 16:57:27,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:57:27,295 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]===
[2020-12-23 16:57:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 16:57:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1357985184, now seen corresponding path program 24 times
[2020-12-23 16:57:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 16:57:27,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699315274]
[2020-12-23 16:57:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 16:57:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 16:57:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-12-23 16:57:32,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699315274]
[2020-12-23 16:57:32,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354833517]
[2020-12-23 16:57:32,113 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-12-23 16:57:32,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s)
[2020-12-23 16:57:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-12-23 16:57:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 82 conjunts are in the unsatisfiable core
[2020-12-23 16:57:32,705 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-12-23 16:57:32,723 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5
[2020-12-23 16:57:32,725 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:32,733 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:32,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:32,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9
[2020-12-23 16:57:33,013 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 16:57:33,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:33,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:33,019 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:33,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11
[2020-12-23 16:57:33,610 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:33,610 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19
[2020-12-23 16:57:33,613 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts.
[2020-12-23 16:57:33,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-12-23 16:57:33,644 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-12-23 16:57:33,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23
[2020-12-23 16:57:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked.
[2020-12-23 16:57:34,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-12-23 16:57:34,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 9] total 59
[2020-12-23 16:57:34,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60274617]
[2020-12-23 16:57:34,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states
[2020-12-23 16:57:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 16:57:34,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants.
[2020-12-23 16:57:34,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422
[2020-12-23 16:57:34,511 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 59 states.
[2020-12-23 16:57:41,139 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:42,701 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:43,866 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:44,820 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:45,755 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:46,718 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:47,682 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:50,406 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:52,230 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39
[2020-12-23 16:57:53,217 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37
[2020-12-23 16:57:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 16:57:54,223 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions.
[2020-12-23 16:57:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states.
[2020-12-23 16:57:54,223 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125
[2020-12-23 16:57:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 16:57:54,224 INFO L225 Difference]: With dead ends: 193
[2020-12-23 16:57:54,224 INFO L226 Difference]: Without dead ends: 0
[2020-12-23 16:57:54,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1034, Invalid=19558, Unknown=0, NotChecked=0, Total=20592
[2020-12-23 16:57:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-12-23 16:57:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-12-23 16:57:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-12-23 16:57:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-12-23 16:57:54,226 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125
[2020-12-23 16:57:54,226 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-12-23 16:57:54,226 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-12-23 16:57:54,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states.
[2020-12-23 16:57:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-12-23 16:57:54,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-12-23 16:57:54,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33
[2020-12-23 16:57:54,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:57:54 BoogieIcfgContainer
[2020-12-23 16:57:54,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-12-23 16:57:54,436 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2020-12-23 16:57:54,436 INFO L271 PluginConnector]: Initializing Witness Printer...
[2020-12-23 16:57:54,436 INFO L275 PluginConnector]: Witness Printer initialized
[2020-12-23 16:57:54,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:54:01" (3/4) ...
[2020-12-23 16:57:54,440 INFO L137 WitnessPrinter]: Generating witness for correct program
[2020-12-23 16:57:54,448 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec
[2020-12-23 16:57:54,454 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges
[2020-12-23 16:57:54,454 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges
[2020-12-23 16:57:54,454 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges
[2020-12-23 16:57:54,504 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/rec_strlen-alloca-1.i-witness.graphml
[2020-12-23 16:57:54,505 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2020-12-23 16:57:54,506 INFO L168 Benchmark]: Toolchain (without parser) took 233991.64 ms. Allocated memory was 158.3 MB in the beginning and 338.7 MB in the end (delta: 180.4 MB). Free memory was 132.4 MB in the beginning and 200.9 MB in the end (delta: -68.5 MB). Peak memory consumption was 112.7 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,506 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.57 ms. Allocated memory is still 158.3 MB. Free memory was 132.2 MB in the beginning and 111.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,507 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.81 ms. Allocated memory is still 158.3 MB. Free memory was 111.8 MB in the beginning and 110.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,508 INFO L168 Benchmark]: Boogie Preprocessor took 30.80 ms. Allocated memory is still 158.3 MB. Free memory was 110.0 MB in the beginning and 109.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,508 INFO L168 Benchmark]: RCFGBuilder took 788.75 ms. Allocated memory is still 158.3 MB. Free memory was 108.8 MB in the beginning and 126.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,509 INFO L168 Benchmark]: TraceAbstraction took 232544.80 ms. Allocated memory was 158.3 MB in the beginning and 338.7 MB in the end (delta: 180.4 MB). Free memory was 126.0 MB in the beginning and 203.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 103.9 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,510 INFO L168 Benchmark]: Witness Printer took 69.05 ms. Allocated memory is still 338.7 MB. Free memory was 203.8 MB in the beginning and 200.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2020-12-23 16:57:54,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 496.57 ms. Allocated memory is still 158.3 MB. Free memory was 132.2 MB in the beginning and 111.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB.
* Boogie Procedure Inliner took 50.81 ms. Allocated memory is still 158.3 MB. Free memory was 111.8 MB in the beginning and 110.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 30.80 ms. Allocated memory is still 158.3 MB. Free memory was 110.0 MB in the beginning and 109.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 788.75 ms. Allocated memory is still 158.3 MB. Free memory was 108.8 MB in the beginning and 126.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 232544.80 ms. Allocated memory was 158.3 MB in the beginning and 338.7 MB in the end (delta: 180.4 MB). Free memory was 126.0 MB in the beginning and 203.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 103.9 MB. Max. memory is 8.0 GB.
* Witness Printer took 69.05 ms. Allocated memory is still 338.7 MB. Free memory was 203.8 MB in the beginning and 200.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 529]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 529]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 532]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 520]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- PositiveResult [Line: 532]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 515]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 515]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- AllSpecificationsHoldResult: All specifications hold
7 specifications checked. All of them hold
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 232.4s, OverallIterations: 34, TraceHistogramMax: 16, AutomataDifference: 137.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 891 SDtfs, 1908 SDslu, 17355 SDs, 0 SdLazy, 53144 SolverSat, 225 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 50.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2940 GetRequests, 1258 SyntacticMatches, 14 SemanticMatches, 1668 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19597 ImplicationChecksByTransitivity, 138.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 34 MinimizatonAttempts, 111 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 84.7s InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3442 NumberOfCodeBlocksAsserted, 168 NumberOfCheckSat, 3419 ConstructedInterpolants, 118 QuantifiedInterpolants, 2801704 SizeOfPredicates, 515 NumberOfNonLiveVariables, 6159 ConjunctsInSsa, 1995 ConjunctsInUnsatCore, 59 InterpolantComputations, 9 PerfectInterpolantSequences, 3582/14030 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...