/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/list-properties/simple_built_from_end.i


--------------------------------------------------------------------------------


This is Ultimate 0.2.1-bitabs-dcfa08f
[2020-12-23 17:18:58,202 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-12-23 17:18:58,205 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-12-23 17:18:58,246 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-12-23 17:18:58,246 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-12-23 17:18:58,248 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2020-12-23 17:18:58,280 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-12-23 17:18:58,285 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-12-23 17:18:58,287 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-12-23 17:18:58,291 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
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[2020-12-23 17:18:58,305 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-12-23 17:18:58,327 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-12-23 17:18:58,333 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-12-23 17:18:58,336 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 17:18:58,387 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-12-23 17:18:58,387 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-12-23 17:18:58,392 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-12-23 17:18:58,392 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-12-23 17:18:58,393 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-12-23 17:18:58,393 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-12-23 17:18:58,393 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2020-12-23 17:18:58,393 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-12-23 17:18:58,394 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-12-23 17:18:58,394 INFO  L138        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2020-12-23 17:18:58,395 INFO  L138        SettingsManager]:  * Bitprecise bitfields=true
[2020-12-23 17:18:58,395 INFO  L138        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2020-12-23 17:18:58,395 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-12-23 17:18:58,396 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2020-12-23 17:18:58,396 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-12-23 17:18:58,396 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-12-23 17:18:58,396 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-12-23 17:18:58,396 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-12-23 17:18:58,397 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-12-23 17:18:58,397 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-12-23 17:18:58,397 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-12-23 17:18:58,397 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-12-23 17:18:58,397 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-12-23 17:18:58,398 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-12-23 17:18:58,398 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-12-23 17:18:58,864 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-12-23 17:18:58,910 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-12-23 17:18:58,914 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-12-23 17:18:58,916 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-12-23 17:18:58,917 INFO  L275        PluginConnector]: CDTParser initialized
[2020-12-23 17:18:58,918 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i
[2020-12-23 17:18:59,017 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c35f458aa/aa4b410c4150440393cb366621bfbeb4/FLAGf1ecbc425
[2020-12-23 17:18:59,786 INFO  L306              CDTParser]: Found 1 translation units.
[2020-12-23 17:18:59,786 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i
[2020-12-23 17:18:59,814 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c35f458aa/aa4b410c4150440393cb366621bfbeb4/FLAGf1ecbc425
[2020-12-23 17:19:00,106 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c35f458aa/aa4b410c4150440393cb366621bfbeb4
[2020-12-23 17:19:00,109 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-12-23 17:19:00,111 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2020-12-23 17:19:00,116 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-12-23 17:19:00,116 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-12-23 17:19:00,120 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-12-23 17:19:00,121 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,123 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bce99ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00, skipping insertion in model container
[2020-12-23 17:19:00,123 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,132 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-12-23 17:19:00,196 INFO  L178         MainTranslator]: Built tables and reachable declarations
left hand side expression in assignment: lhs: VariableLHS[~t~0,<LOCAL,main>]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],base],StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],offset]]]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],offset]]]]
left hand side expression in assignment: lhs: VariableLHS[~p~0,<LOCAL,main>]
[2020-12-23 17:19:00,462 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138]
left hand side expression in assignment: lhs: VariableLHS[~p~0,<LOCAL,main>]
[2020-12-23 17:19:00,466 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-12-23 17:19:00,479 INFO  L203         MainTranslator]: Completed pre-run
left hand side expression in assignment: lhs: VariableLHS[~t~0,<LOCAL,main>]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],base],StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],offset]]]
left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~t~0,<LOCAL,main>],offset]]]]
left hand side expression in assignment: lhs: VariableLHS[~p~0,<LOCAL,main>]
[2020-12-23 17:19:00,561 WARN  L226   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138]
left hand side expression in assignment: lhs: VariableLHS[~p~0,<LOCAL,main>]
[2020-12-23 17:19:00,564 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-12-23 17:19:00,635 INFO  L208         MainTranslator]: Completed translation
[2020-12-23 17:19:00,635 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00 WrapperNode
[2020-12-23 17:19:00,636 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-12-23 17:19:00,637 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-12-23 17:19:00,638 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-12-23 17:19:00,638 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2020-12-23 17:19:00,646 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,672 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,694 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-12-23 17:19:00,695 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-12-23 17:19:00,695 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-12-23 17:19:00,696 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-12-23 17:19:00,706 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,706 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,710 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,710 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,718 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,725 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,727 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (1/1) ...
[2020-12-23 17:19:00,730 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-12-23 17:19:00,731 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-12-23 17:19:00,731 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-12-23 17:19:00,732 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-12-23 17:19:00,733 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (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 17:19:00,852 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-12-23 17:19:00,852 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-12-23 17:19:00,852 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-12-23 17:19:00,853 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-12-23 17:19:00,853 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-12-23 17:19:00,853 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-12-23 17:19:00,853 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-12-23 17:19:00,853 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-12-23 17:19:00,853 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-12-23 17:19:01,187 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-12-23 17:19:01,188 INFO  L299             CfgBuilder]: Removed 8 assume(true) statements.
[2020-12-23 17:19:01,190 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:19:01 BoogieIcfgContainer
[2020-12-23 17:19:01,190 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-12-23 17:19:01,192 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-12-23 17:19:01,193 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-12-23 17:19:01,196 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-12-23 17:19:01,197 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:19:00" (1/3) ...
[2020-12-23 17:19:01,198 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f66c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:19:01, skipping insertion in model container
[2020-12-23 17:19:01,198 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:19:00" (2/3) ...
[2020-12-23 17:19:01,199 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f66c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:19:01, skipping insertion in model container
[2020-12-23 17:19:01,199 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:19:01" (3/3) ...
[2020-12-23 17:19:01,201 INFO  L111   eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i
[2020-12-23 17:19:01,209 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-12-23 17:19:01,214 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations.
[2020-12-23 17:19:01,237 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 10 error locations.
[2020-12-23 17:19:01,264 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-12-23 17:19:01,264 INFO  L378      AbstractCegarLoop]: Hoare is false
[2020-12-23 17:19:01,265 INFO  L379      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-12-23 17:19:01,265 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-12-23 17:19:01,265 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-12-23 17:19:01,265 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-12-23 17:19:01,265 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-12-23 17:19:01,265 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-12-23 17:19:01,292 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states.
[2020-12-23 17:19:01,305 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2020-12-23 17:19:01,307 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:01,308 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2020-12-23 17:19:01,309 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:01,319 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:01,320 INFO  L82        PathProgramCache]: Analyzing trace with hash 28716783, now seen corresponding path program 1 times
[2020-12-23 17:19:01,332 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:01,333 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005696422]
[2020-12-23 17:19:01,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:01,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:01,552 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 17:19:01,553 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005696422]
[2020-12-23 17:19:01,554 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:01,555 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-12-23 17:19:01,556 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596768856]
[2020-12-23 17:19:01,560 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-12-23 17:19:01,561 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:01,581 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-12-23 17:19:01,584 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-12-23 17:19:01,587 INFO  L87              Difference]: Start difference. First operand 28 states. Second operand 2 states.
[2020-12-23 17:19:01,606 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:01,607 INFO  L93              Difference]: Finished difference Result 28 states and 30 transitions.
[2020-12-23 17:19:01,607 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-12-23 17:19:01,608 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 5
[2020-12-23 17:19:01,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:01,625 INFO  L225             Difference]: With dead ends: 28
[2020-12-23 17:19:01,625 INFO  L226             Difference]: Without dead ends: 25
[2020-12-23 17:19:01,627 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-12-23 17:19:01,648 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-12-23 17:19:01,676 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-12-23 17:19:01,678 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-12-23 17:19:01,680 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2020-12-23 17:19:01,681 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5
[2020-12-23 17:19:01,681 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:01,682 INFO  L481      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2020-12-23 17:19:01,682 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-12-23 17:19:01,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2020-12-23 17:19:01,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 17:19:01,683 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:01,684 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:01,685 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-12-23 17:19:01,685 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:01,689 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:01,689 INFO  L82        PathProgramCache]: Analyzing trace with hash 889570012, now seen corresponding path program 1 times
[2020-12-23 17:19:01,689 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:01,690 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293745200]
[2020-12-23 17:19:01,690 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:01,721 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:01,755 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 17:19:01,756 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293745200]
[2020-12-23 17:19:01,756 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:01,756 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-12-23 17:19:01,756 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272905147]
[2020-12-23 17:19:01,758 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-12-23 17:19:01,758 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:01,759 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-12-23 17:19:01,759 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 17:19:01,760 INFO  L87              Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states.
[2020-12-23 17:19:01,817 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:01,817 INFO  L93              Difference]: Finished difference Result 39 states and 41 transitions.
[2020-12-23 17:19:01,818 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-12-23 17:19:01,818 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2020-12-23 17:19:01,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:01,820 INFO  L225             Difference]: With dead ends: 39
[2020-12-23 17:19:01,820 INFO  L226             Difference]: Without dead ends: 38
[2020-12-23 17:19:01,821 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 17:19:01,821 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-12-23 17:19:01,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32.
[2020-12-23 17:19:01,826 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-12-23 17:19:01,827 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2020-12-23 17:19:01,827 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 6
[2020-12-23 17:19:01,827 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:01,828 INFO  L481      AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2020-12-23 17:19:01,828 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-12-23 17:19:01,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2020-12-23 17:19:01,828 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 17:19:01,828 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:01,829 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:01,829 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-12-23 17:19:01,829 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:01,830 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:01,830 INFO  L82        PathProgramCache]: Analyzing trace with hash 889570056, now seen corresponding path program 1 times
[2020-12-23 17:19:01,830 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:01,830 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589684361]
[2020-12-23 17:19:01,831 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:01,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:01,895 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 17:19:01,896 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589684361]
[2020-12-23 17:19:01,896 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:01,896 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-12-23 17:19:01,896 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572478473]
[2020-12-23 17:19:01,897 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-12-23 17:19:01,897 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:01,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-12-23 17:19:01,898 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 17:19:01,898 INFO  L87              Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 3 states.
[2020-12-23 17:19:01,927 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:01,928 INFO  L93              Difference]: Finished difference Result 36 states and 37 transitions.
[2020-12-23 17:19:01,928 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-12-23 17:19:01,928 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2020-12-23 17:19:01,929 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:01,929 INFO  L225             Difference]: With dead ends: 36
[2020-12-23 17:19:01,930 INFO  L226             Difference]: Without dead ends: 35
[2020-12-23 17:19:01,930 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 17:19:01,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-12-23 17:19:01,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27.
[2020-12-23 17:19:01,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-12-23 17:19:01,934 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions.
[2020-12-23 17:19:01,935 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 6
[2020-12-23 17:19:01,935 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:01,935 INFO  L481      AbstractCegarLoop]: Abstraction has 27 states and 28 transitions.
[2020-12-23 17:19:01,935 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-12-23 17:19:01,935 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions.
[2020-12-23 17:19:01,936 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 17:19:01,936 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:01,936 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:01,936 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-12-23 17:19:01,937 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:01,937 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:01,937 INFO  L82        PathProgramCache]: Analyzing trace with hash 889571371, now seen corresponding path program 1 times
[2020-12-23 17:19:01,938 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:01,938 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756968160]
[2020-12-23 17:19:01,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:01,967 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,032 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 17:19:02,033 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756968160]
[2020-12-23 17:19:02,033 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,034 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-12-23 17:19:02,034 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855235820]
[2020-12-23 17:19:02,034 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-12-23 17:19:02,035 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,036 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-12-23 17:19:02,036 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 17:19:02,036 INFO  L87              Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states.
[2020-12-23 17:19:02,075 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,075 INFO  L93              Difference]: Finished difference Result 25 states and 26 transitions.
[2020-12-23 17:19:02,076 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-12-23 17:19:02,076 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2020-12-23 17:19:02,076 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,077 INFO  L225             Difference]: With dead ends: 25
[2020-12-23 17:19:02,077 INFO  L226             Difference]: Without dead ends: 25
[2020-12-23 17:19:02,078 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 17:19:02,079 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-12-23 17:19:02,081 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-12-23 17:19:02,081 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-12-23 17:19:02,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2020-12-23 17:19:02,082 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 6
[2020-12-23 17:19:02,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:02,083 INFO  L481      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2020-12-23 17:19:02,083 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-12-23 17:19:02,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2020-12-23 17:19:02,083 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-12-23 17:19:02,084 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:02,084 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:02,084 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-12-23 17:19:02,084 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:02,085 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:02,085 INFO  L82        PathProgramCache]: Analyzing trace with hash 889571372, now seen corresponding path program 1 times
[2020-12-23 17:19:02,086 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:02,086 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231272527]
[2020-12-23 17:19:02,086 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:02,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,136 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 17:19:02,137 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231272527]
[2020-12-23 17:19:02,137 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,137 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-12-23 17:19:02,138 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426079587]
[2020-12-23 17:19:02,138 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-12-23 17:19:02,138 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,139 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-12-23 17:19:02,139 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-12-23 17:19:02,140 INFO  L87              Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states.
[2020-12-23 17:19:02,169 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,170 INFO  L93              Difference]: Finished difference Result 23 states and 24 transitions.
[2020-12-23 17:19:02,172 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-12-23 17:19:02,173 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2020-12-23 17:19:02,173 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,174 INFO  L225             Difference]: With dead ends: 23
[2020-12-23 17:19:02,174 INFO  L226             Difference]: Without dead ends: 23
[2020-12-23 17:19:02,174 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 17:19:02,175 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2020-12-23 17:19:02,182 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2020-12-23 17:19:02,183 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2020-12-23 17:19:02,184 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions.
[2020-12-23 17:19:02,184 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 6
[2020-12-23 17:19:02,184 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:02,184 INFO  L481      AbstractCegarLoop]: Abstraction has 23 states and 24 transitions.
[2020-12-23 17:19:02,184 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-12-23 17:19:02,185 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions.
[2020-12-23 17:19:02,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-12-23 17:19:02,187 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:02,188 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:02,188 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-12-23 17:19:02,188 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:02,189 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:02,189 INFO  L82        PathProgramCache]: Analyzing trace with hash 1376170662, now seen corresponding path program 1 times
[2020-12-23 17:19:02,189 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:02,190 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098800607]
[2020-12-23 17:19:02,195 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:02,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,307 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 17:19:02,308 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098800607]
[2020-12-23 17:19:02,308 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,308 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-12-23 17:19:02,309 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071259597]
[2020-12-23 17:19:02,309 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 17:19:02,309 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,310 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 17:19:02,311 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-12-23 17:19:02,311 INFO  L87              Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states.
[2020-12-23 17:19:02,371 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,371 INFO  L93              Difference]: Finished difference Result 38 states and 39 transitions.
[2020-12-23 17:19:02,372 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-12-23 17:19:02,372 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 12
[2020-12-23 17:19:02,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,373 INFO  L225             Difference]: With dead ends: 38
[2020-12-23 17:19:02,373 INFO  L226             Difference]: Without dead ends: 38
[2020-12-23 17:19:02,374 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-12-23 17:19:02,375 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-12-23 17:19:02,377 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24.
[2020-12-23 17:19:02,378 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-12-23 17:19:02,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions.
[2020-12-23 17:19:02,379 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12
[2020-12-23 17:19:02,379 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:02,379 INFO  L481      AbstractCegarLoop]: Abstraction has 24 states and 25 transitions.
[2020-12-23 17:19:02,380 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 17:19:02,380 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions.
[2020-12-23 17:19:02,380 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-12-23 17:19:02,380 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:02,381 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:02,381 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-12-23 17:19:02,381 INFO  L429      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:02,382 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:02,382 INFO  L82        PathProgramCache]: Analyzing trace with hash 1376170706, now seen corresponding path program 1 times
[2020-12-23 17:19:02,382 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:02,383 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758152290]
[2020-12-23 17:19:02,383 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:02,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,444 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 17:19:02,445 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758152290]
[2020-12-23 17:19:02,447 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,447 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-12-23 17:19:02,448 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413241773]
[2020-12-23 17:19:02,449 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 17:19:02,449 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,452 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 17:19:02,453 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-12-23 17:19:02,453 INFO  L87              Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states.
[2020-12-23 17:19:02,531 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,531 INFO  L93              Difference]: Finished difference Result 29 states and 30 transitions.
[2020-12-23 17:19:02,532 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-12-23 17:19:02,532 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 12
[2020-12-23 17:19:02,532 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,533 INFO  L225             Difference]: With dead ends: 29
[2020-12-23 17:19:02,533 INFO  L226             Difference]: Without dead ends: 29
[2020-12-23 17:19:02,533 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-12-23 17:19:02,534 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2020-12-23 17:19:02,536 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24.
[2020-12-23 17:19:02,537 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-12-23 17:19:02,537 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions.
[2020-12-23 17:19:02,538 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12
[2020-12-23 17:19:02,538 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:02,538 INFO  L481      AbstractCegarLoop]: Abstraction has 24 states and 26 transitions.
[2020-12-23 17:19:02,538 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 17:19:02,538 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions.
[2020-12-23 17:19:02,539 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-12-23 17:19:02,539 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:02,539 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:02,539 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-12-23 17:19:02,540 INFO  L429      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:02,545 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:02,546 INFO  L82        PathProgramCache]: Analyzing trace with hash 1376170707, now seen corresponding path program 1 times
[2020-12-23 17:19:02,546 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:02,546 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049790879]
[2020-12-23 17:19:02,547 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:02,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,662 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 17:19:02,662 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049790879]
[2020-12-23 17:19:02,663 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,663 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-12-23 17:19:02,663 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960194913]
[2020-12-23 17:19:02,664 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-12-23 17:19:02,664 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,665 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-12-23 17:19:02,665 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-12-23 17:19:02,665 INFO  L87              Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states.
[2020-12-23 17:19:02,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,753 INFO  L93              Difference]: Finished difference Result 33 states and 34 transitions.
[2020-12-23 17:19:02,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-12-23 17:19:02,754 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 12
[2020-12-23 17:19:02,754 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,756 INFO  L225             Difference]: With dead ends: 33
[2020-12-23 17:19:02,757 INFO  L226             Difference]: Without dead ends: 33
[2020-12-23 17:19:02,758 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-12-23 17:19:02,759 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-12-23 17:19:02,760 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26.
[2020-12-23 17:19:02,761 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-12-23 17:19:02,764 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions.
[2020-12-23 17:19:02,764 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12
[2020-12-23 17:19:02,765 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:02,765 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 28 transitions.
[2020-12-23 17:19:02,765 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-12-23 17:19:02,765 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions.
[2020-12-23 17:19:02,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-12-23 17:19:02,766 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:02,766 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:02,766 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-12-23 17:19:02,767 INFO  L429      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:02,767 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:02,768 INFO  L82        PathProgramCache]: Analyzing trace with hash -349878285, now seen corresponding path program 1 times
[2020-12-23 17:19:02,769 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:02,769 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380416966]
[2020-12-23 17:19:02,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:02,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-12-23 17:19:02,895 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 17:19:02,895 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380416966]
[2020-12-23 17:19:02,896 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-12-23 17:19:02,896 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-12-23 17:19:02,896 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956804267]
[2020-12-23 17:19:02,897 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-12-23 17:19:02,897 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-12-23 17:19:02,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-12-23 17:19:02,901 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-12-23 17:19:02,901 INFO  L87              Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states.
[2020-12-23 17:19:02,994 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-12-23 17:19:02,995 INFO  L93              Difference]: Finished difference Result 30 states and 31 transitions.
[2020-12-23 17:19:02,995 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-12-23 17:19:02,995 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2020-12-23 17:19:02,996 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-12-23 17:19:02,999 INFO  L225             Difference]: With dead ends: 30
[2020-12-23 17:19:02,999 INFO  L226             Difference]: Without dead ends: 30
[2020-12-23 17:19:02,999 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2020-12-23 17:19:03,004 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-12-23 17:19:03,012 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26.
[2020-12-23 17:19:03,013 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-12-23 17:19:03,017 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions.
[2020-12-23 17:19:03,017 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14
[2020-12-23 17:19:03,017 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-12-23 17:19:03,017 INFO  L481      AbstractCegarLoop]: Abstraction has 26 states and 27 transitions.
[2020-12-23 17:19:03,018 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-12-23 17:19:03,018 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions.
[2020-12-23 17:19:03,024 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-12-23 17:19:03,025 INFO  L414         BasicCegarLoop]: Found error trace
[2020-12-23 17:19:03,025 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-12-23 17:19:03,025 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-12-23 17:19:03,025 INFO  L429      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]===
[2020-12-23 17:19:03,026 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-12-23 17:19:03,026 INFO  L82        PathProgramCache]: Analyzing trace with hash 666457592, now seen corresponding path program 1 times
[2020-12-23 17:19:03,026 INFO  L162   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-12-23 17:19:03,027 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068224855]
[2020-12-23 17:19:03,027 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-12-23 17:19:03,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-12-23 17:19:03,047 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-12-23 17:19:03,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-12-23 17:19:03,060 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-12-23 17:19:03,088 INFO  L173   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-12-23 17:19:03,088 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-12-23 17:19:03,088 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-12-23 17:19:03,124 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:19:03 BoogieIcfgContainer
[2020-12-23 17:19:03,124 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-12-23 17:19:03,125 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2020-12-23 17:19:03,125 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2020-12-23 17:19:03,125 INFO  L275        PluginConnector]: Witness Printer initialized
[2020-12-23 17:19:03,126 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:19:01" (3/4) ...
[2020-12-23 17:19:03,132 INFO  L140         WitnessPrinter]: No result that supports witness generation found
[2020-12-23 17:19:03,132 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2020-12-23 17:19:03,138 INFO  L168              Benchmark]: Toolchain (without parser) took 3025.54 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 124.2 MB in the beginning and 126.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,139 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,140 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 519.80 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 102.3 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,141 INFO  L168              Benchmark]: Boogie Procedure Inliner took 57.91 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 100.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,144 INFO  L168              Benchmark]: Boogie Preprocessor took 35.23 ms. Allocated memory is still 151.0 MB. Free memory was 100.5 MB in the beginning and 99.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,145 INFO  L168              Benchmark]: RCFGBuilder took 459.22 ms. Allocated memory is still 151.0 MB. Free memory was 99.2 MB in the beginning and 118.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,146 INFO  L168              Benchmark]: TraceAbstraction took 1931.92 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 118.2 MB in the beginning and 127.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,147 INFO  L168              Benchmark]: Witness Printer took 10.10 ms. Allocated memory is still 181.4 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-12-23 17:19:03,157 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 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 519.80 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 102.3 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB.
 * Boogie Procedure Inliner took 57.91 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 100.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 35.23 ms. Allocated memory is still 151.0 MB. Free memory was 100.5 MB in the beginning and 99.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 459.22 ms. Allocated memory is still 151.0 MB. Free memory was 99.2 MB in the beginning and 118.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 1931.92 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 118.2 MB in the beginning and 127.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB.
 * Witness Printer took 10.10 ms. Allocated memory is still 181.4 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed
    Unable to prove that all allocated memory was freed
 Reason: overapproximation of memtrack at line 531. 
Possible FailurePath: 
[L532]              List t;
[L533]              List p = 0;
[L534]  COND TRUE   __VERIFIER_nondet_int()
[L535]              t = (List) malloc(sizeof(struct node))
[L536]  COND FALSE  !(t == 0)
[L537]              t->h = 1
[L538]              t->n = p
[L539]              p = t
[L534]  COND FALSE  !(__VERIFIER_nondet_int())
[L541]  COND TRUE   p!=0
[L542]  EXPR        p->h
[L542]  COND FALSE  !(p->h != 1)
[L545]  EXPR        p->n
[L545]              p = p->n
[L541]  COND FALSE  !(p!=0)

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 28 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 181 SDslu, 70 SDs, 0 SdLazy, 178 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 2591 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...