/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 09:28:25,369 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 09:28:25,371 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-10 09:28:25,425 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-10 09:28:25,425 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-10 09:28:25,437 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-10 09:28:25,440 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2022-01-10 09:28:25,444 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-10 09:28:25,448 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-01-10 09:28:25,450 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-10 09:28:25,450 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-10 09:28:25,452 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-10 09:28:25,453 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 09:28:25,456 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 09:28:25,456 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 09:28:25,457 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 09:28:25,459 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 09:28:25,464 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 09:28:25,465 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 09:28:25,466 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 09:28:25,467 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 09:28:25,468 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 09:28:25,473 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-10 09:28:25,474 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-10 09:28:25,474 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-10 09:28:25,475 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-10 09:28:25,475 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-10 09:28:25,476 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 09:28:25,476 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-10 09:28:25,477 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-10 09:28:25,478 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-10 09:28:25,479 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-10 09:28:25,480 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 09:28:25,480 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-10 09:28:25,481 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-10 09:28:25,481 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-10 09:28:25,481 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 09:28:25,482 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 09:28:25,483 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf
[2022-01-10 09:28:25,513 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 09:28:25,513 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 09:28:25,514 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 09:28:25,514 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 09:28:25,515 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 09:28:25,515 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 09:28:25,515 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 09:28:25,516 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 09:28:25,516 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 09:28:25,516 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 09:28:25,517 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 09:28:25,518 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 09:28:25,518 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 09:28:25,518 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 09:28:25,518 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 09:28:25,518 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 09:28:25,518 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 09:28:25,519 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 09:28:25,520 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-01-10 09:28:25,520 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 09:28:25,521 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-10 09:28:25,521 INFO  L138        SettingsManager]:  * TransformationType=BV_TO_INT_BITWISE
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/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 09:28:25,764 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 09:28:25,786 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 09:28:25,788 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 09:28:25,789 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 09:28:25,790 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 09:28:25,791 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i
[2022-01-10 09:28:25,837 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c1125c/19a45837a2be44c9a0b5e52116a74226/FLAG70228fdfd
[2022-01-10 09:28:26,218 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 09:28:26,219 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i
[2022-01-10 09:28:26,224 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c1125c/19a45837a2be44c9a0b5e52116a74226/FLAG70228fdfd
[2022-01-10 09:28:26,236 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c1125c/19a45837a2be44c9a0b5e52116a74226
[2022-01-10 09:28:26,238 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 09:28:26,239 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-01-10 09:28:26,244 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 09:28:26,244 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 09:28:26,247 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 09:28:26,248 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,249 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f071b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26, skipping insertion in model container
[2022-01-10 09:28:26,249 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,255 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 09:28:26,268 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 09:28:26,470 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i[816,829]
[2022-01-10 09:28:26,490 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 09:28:26,500 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 09:28:26,512 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i[816,829]
[2022-01-10 09:28:26,528 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 09:28:26,547 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 09:28:26,548 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26 WrapperNode
[2022-01-10 09:28:26,549 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 09:28:26,550 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 09:28:26,550 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 09:28:26,550 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 09:28:26,556 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,570 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,589 INFO  L137                Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61
[2022-01-10 09:28:26,590 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 09:28:26,590 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 09:28:26,590 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 09:28:26,590 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 09:28:26,598 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,598 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,602 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,603 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,617 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,621 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,628 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,630 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 09:28:26,631 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 09:28:26,631 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 09:28:26,631 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 09:28:26,633 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:26,639 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 09:28:26,648 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 09:28:26,665 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 09:28:26,692 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 09:28:26,711 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 09:28:26,711 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 09:28:26,711 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-01-10 09:28:26,711 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2022-01-10 09:28:26,711 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 09:28:26,711 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 09:28:26,712 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-10 09:28:26,712 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2022-01-10 09:28:26,772 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 09:28:26,774 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 09:28:26,927 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 09:28:26,932 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 09:28:26,932 INFO  L299             CfgBuilder]: Removed 5 assume(true) statements.
[2022-01-10 09:28:26,933 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:28:26 BoogieIcfgContainer
[2022-01-10 09:28:26,934 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 09:28:26,934 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-10 09:28:26,934 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-01-10 09:28:26,940 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-01-10 09:28:26,943 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:28:26" (1/1) ...
[2022-01-10 09:28:27,068 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:28:27 BasicIcfg
[2022-01-10 09:28:27,068 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-10 09:28:27,069 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 09:28:27,069 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 09:28:27,088 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 09:28:27,088 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:28:26" (1/4) ...
[2022-01-10 09:28:27,090 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:28:27, skipping insertion in model container
[2022-01-10 09:28:27,090 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:28:26" (2/4) ...
[2022-01-10 09:28:27,090 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:28:27, skipping insertion in model container
[2022-01-10 09:28:27,090 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:28:26" (3/4) ...
[2022-01-10 09:28:27,090 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:28:27, skipping insertion in model container
[2022-01-10 09:28:27,090 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:28:27" (4/4) ...
[2022-01-10 09:28:27,091 INFO  L111   eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.iTransformedIcfg
[2022-01-10 09:28:27,095 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 09:28:27,096 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 09:28:27,131 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 09:28:27,137 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 09:28:27,138 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 09:28:27,152 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 09:28:27,157 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:28:27,158 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:28:27,158 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:28:27,164 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:28:27,164 INFO  L85        PathProgramCache]: Analyzing trace with hash 894483611, now seen corresponding path program 1 times
[2022-01-10 09:28:27,171 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:28:27,171 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648889504]
[2022-01-10 09:28:27,172 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:27,173 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:28:27,303 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:27,366 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 09:28:27,366 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:28:27,366 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648889504]
[2022-01-10 09:28:27,367 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648889504] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 09:28:27,367 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 09:28:27,368 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-01-10 09:28:27,369 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711355679]
[2022-01-10 09:28:27,371 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 09:28:27,374 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-01-10 09:28:27,374 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 09:28:27,401 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-01-10 09:28:27,402 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-01-10 09:28:27,404 INFO  L87              Difference]: Start difference. First operand  has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 09:28:27,418 INFO  L93              Difference]: Finished difference Result 37 states and 55 transitions.
[2022-01-10 09:28:27,419 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-01-10 09:28:27,421 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13
[2022-01-10 09:28:27,421 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 09:28:27,427 INFO  L225             Difference]: With dead ends: 37
[2022-01-10 09:28:27,427 INFO  L226             Difference]: Without dead ends: 16
[2022-01-10 09:28:27,430 INFO  L932         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
[2022-01-10 09:28:27,434 INFO  L933         BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 09:28:27,435 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 09:28:27,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2022-01-10 09:28:27,459 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2022-01-10 09:28:27,460 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions.
[2022-01-10 09:28:27,462 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13
[2022-01-10 09:28:27,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 09:28:27,463 INFO  L470      AbstractCegarLoop]: Abstraction has 16 states and 20 transitions.
[2022-01-10 09:28:27,464 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions.
[2022-01-10 09:28:27,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-01-10 09:28:27,465 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:28:27,466 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:28:27,466 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-10 09:28:27,466 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:28:27,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:28:27,468 INFO  L85        PathProgramCache]: Analyzing trace with hash -1821495009, now seen corresponding path program 1 times
[2022-01-10 09:28:27,468 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:28:27,468 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483521988]
[2022-01-10 09:28:27,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:27,470 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:28:27,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:27,637 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 09:28:27,638 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:28:27,638 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483521988]
[2022-01-10 09:28:27,638 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483521988] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 09:28:27,638 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 09:28:27,638 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 09:28:27,639 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481154849]
[2022-01-10 09:28:27,639 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 09:28:27,640 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 09:28:27,640 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 09:28:27,640 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 09:28:27,641 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 09:28:27,641 INFO  L87              Difference]: Start difference. First operand 16 states and 20 transitions. Second operand  has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,689 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 09:28:27,689 INFO  L93              Difference]: Finished difference Result 33 states and 44 transitions.
[2022-01-10 09:28:27,690 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 09:28:27,691 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13
[2022-01-10 09:28:27,691 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 09:28:27,693 INFO  L225             Difference]: With dead ends: 33
[2022-01-10 09:28:27,693 INFO  L226             Difference]: Without dead ends: 20
[2022-01-10 09:28:27,695 INFO  L932         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
[2022-01-10 09:28:27,696 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 09:28:27,697 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 09:28:27,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2022-01-10 09:28:27,701 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2022-01-10 09:28:27,701 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions.
[2022-01-10 09:28:27,702 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13
[2022-01-10 09:28:27,702 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 09:28:27,702 INFO  L470      AbstractCegarLoop]: Abstraction has 20 states and 24 transitions.
[2022-01-10 09:28:27,702 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:27,702 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions.
[2022-01-10 09:28:27,703 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-10 09:28:27,703 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:28:27,703 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:28:27,703 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-10 09:28:27,704 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:28:27,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:28:27,704 INFO  L85        PathProgramCache]: Analyzing trace with hash -1000950881, now seen corresponding path program 1 times
[2022-01-10 09:28:27,704 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:28:27,705 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798590570]
[2022-01-10 09:28:27,705 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:27,705 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:28:27,779 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:27,816 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 09:28:27,816 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:28:27,816 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798590570]
[2022-01-10 09:28:27,816 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798590570] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 09:28:27,817 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83445781]
[2022-01-10 09:28:27,817 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:27,817 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:28:27,817 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 09:28:27,819 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 09:28:27,853 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-10 09:28:27,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:27,917 INFO  L263         TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-01-10 09:28:27,922 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 09:28:28,078 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 09:28:28,079 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 09:28:28,201 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2022-01-10 09:28:28,202 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [83445781] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 09:28:28,204 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 09:28:28,204 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-01-10 09:28:28,205 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513661481]
[2022-01-10 09:28:28,205 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 09:28:28,205 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-01-10 09:28:28,205 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 09:28:28,206 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-01-10 09:28:28,206 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2022-01-10 09:28:28,206 INFO  L87              Difference]: Start difference. First operand 20 states and 24 transitions. Second operand  has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:28,400 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 09:28:28,400 INFO  L93              Difference]: Finished difference Result 48 states and 67 transitions.
[2022-01-10 09:28:28,401 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-01-10 09:28:28,402 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17
[2022-01-10 09:28:28,402 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 09:28:28,402 INFO  L225             Difference]: With dead ends: 48
[2022-01-10 09:28:28,402 INFO  L226             Difference]: Without dead ends: 32
[2022-01-10 09:28:28,403 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2022-01-10 09:28:28,404 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 09:28:28,404 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-01-10 09:28:28,405 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-01-10 09:28:28,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-01-10 09:28:28,411 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:28,414 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions.
[2022-01-10 09:28:28,414 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17
[2022-01-10 09:28:28,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 09:28:28,414 INFO  L470      AbstractCegarLoop]: Abstraction has 32 states and 36 transitions.
[2022-01-10 09:28:28,415 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:28,415 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions.
[2022-01-10 09:28:28,416 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-10 09:28:28,416 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:28:28,417 INFO  L514         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:28:28,440 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-10 09:28:28,635 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:28:28,636 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:28:28,636 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:28:28,636 INFO  L85        PathProgramCache]: Analyzing trace with hash -1582604513, now seen corresponding path program 2 times
[2022-01-10 09:28:28,636 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:28:28,636 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739452540]
[2022-01-10 09:28:28,636 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:28,637 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:28:28,840 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:28,939 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2022-01-10 09:28:28,939 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:28:28,940 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739452540]
[2022-01-10 09:28:28,940 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739452540] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 09:28:28,940 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790246104]
[2022-01-10 09:28:28,940 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 09:28:28,940 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:28:28,941 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 09:28:28,944 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 09:28:28,945 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-10 09:28:29,373 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 09:28:29,374 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 09:28:29,377 INFO  L263         TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 41 conjunts are in the unsatisfiable core
[2022-01-10 09:28:29,380 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 09:28:30,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2022-01-10 09:28:30,061 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 09:28:30,989 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2022-01-10 09:28:30,989 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [790246104] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 09:28:30,989 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 09:28:30,989 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16
[2022-01-10 09:28:30,989 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144220077]
[2022-01-10 09:28:30,990 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 09:28:30,990 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-01-10 09:28:30,990 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 09:28:30,991 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-01-10 09:28:30,991 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240
[2022-01-10 09:28:30,991 INFO  L87              Difference]: Start difference. First operand 32 states and 36 transitions. Second operand  has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:38,185 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 09:28:38,185 INFO  L93              Difference]: Finished difference Result 62 states and 74 transitions.
[2022-01-10 09:28:38,186 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-01-10 09:28:38,186 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29
[2022-01-10 09:28:38,186 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 09:28:38,187 INFO  L225             Difference]: With dead ends: 62
[2022-01-10 09:28:38,187 INFO  L226             Difference]: Without dead ends: 37
[2022-01-10 09:28:38,190 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380
[2022-01-10 09:28:38,191 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-01-10 09:28:38,191 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time]
[2022-01-10 09:28:38,192 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-01-10 09:28:38,200 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2022-01-10 09:28:38,200 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:38,201 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions.
[2022-01-10 09:28:38,201 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 29
[2022-01-10 09:28:38,201 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 09:28:38,201 INFO  L470      AbstractCegarLoop]: Abstraction has 37 states and 41 transitions.
[2022-01-10 09:28:38,201 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:28:38,202 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions.
[2022-01-10 09:28:38,202 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2022-01-10 09:28:38,202 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:28:38,202 INFO  L514         BasicCegarLoop]: trace histogram [9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:28:38,212 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-10 09:28:38,408 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2022-01-10 09:28:38,408 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:28:38,409 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:28:38,409 INFO  L85        PathProgramCache]: Analyzing trace with hash -518831155, now seen corresponding path program 3 times
[2022-01-10 09:28:38,409 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:28:38,409 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217852780]
[2022-01-10 09:28:38,409 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:28:38,410 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:28:38,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:28:38,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked.
[2022-01-10 09:28:38,673 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:28:38,673 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217852780]
[2022-01-10 09:28:38,673 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217852780] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 09:28:38,674 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290315606]
[2022-01-10 09:28:38,674 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 09:28:38,674 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:28:38,674 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 09:28:38,712 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 09:28:38,727 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-10 09:28:39,688 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-01-10 09:28:39,689 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 09:28:39,694 INFO  L263         TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjunts are in the unsatisfiable core
[2022-01-10 09:28:39,696 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 09:28:53,590 INFO  L134       CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked.
[2022-01-10 09:28:53,590 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 09:28:57,918 INFO  L134       CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked.
[2022-01-10 09:28:57,919 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [290315606] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 09:28:57,919 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-01-10 09:28:57,919 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18
[2022-01-10 09:28:57,919 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936509600]
[2022-01-10 09:28:57,919 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-01-10 09:28:57,921 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-01-10 09:28:57,921 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-10 09:28:57,922 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-01-10 09:28:57,922 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=209, Unknown=3, NotChecked=0, Total=306
[2022-01-10 09:28:57,922 INFO  L87              Difference]: Start difference. First operand 37 states and 41 transitions. Second operand  has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:29:05,676 WARN  L228               SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 09:29:13,686 WARN  L228               SmtUtils]: Spent 6.89s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-01-10 09:29:25,360 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 09:29:25,360 INFO  L93              Difference]: Finished difference Result 75 states and 95 transitions.
[2022-01-10 09:29:25,360 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-01-10 09:29:25,361 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34
[2022-01-10 09:29:25,361 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 09:29:25,362 INFO  L225             Difference]: With dead ends: 75
[2022-01-10 09:29:25,362 INFO  L226             Difference]: Without dead ends: 50
[2022-01-10 09:29:25,362 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=168, Invalid=334, Unknown=4, NotChecked=0, Total=506
[2022-01-10 09:29:25,363 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time
[2022-01-10 09:29:25,363 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 176 Invalid, 0 Unknown, 44 Unchecked, 6.7s Time]
[2022-01-10 09:29:25,364 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2022-01-10 09:29:25,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2022-01-10 09:29:25,376 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:29:25,377 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions.
[2022-01-10 09:29:25,377 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34
[2022-01-10 09:29:25,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 09:29:25,377 INFO  L470      AbstractCegarLoop]: Abstraction has 50 states and 54 transitions.
[2022-01-10 09:29:25,378 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 09:29:25,378 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions.
[2022-01-10 09:29:25,379 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2022-01-10 09:29:25,379 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 09:29:25,379 INFO  L514         BasicCegarLoop]: trace histogram [10, 10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 09:29:25,384 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-01-10 09:29:25,584 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:29:25,585 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 09:29:25,585 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 09:29:25,585 INFO  L85        PathProgramCache]: Analyzing trace with hash -448468513, now seen corresponding path program 4 times
[2022-01-10 09:29:25,586 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-10 09:29:25,586 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485393832]
[2022-01-10 09:29:25,586 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 09:29:25,586 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-10 09:29:25,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 09:29:25,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked.
[2022-01-10 09:29:25,898 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-10 09:29:25,898 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485393832]
[2022-01-10 09:29:25,899 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485393832] provided 0 perfect and 1 imperfect interpolant sequences
[2022-01-10 09:29:25,899 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257311519]
[2022-01-10 09:29:25,899 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 09:29:25,899 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-10 09:29:25,899 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 09:29:25,908 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-01-10 09:29:25,909 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-10 09:29:26,078 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 09:29:26,079 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 09:29:26,082 INFO  L263         TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 40 conjunts are in the unsatisfiable core
[2022-01-10 09:29:26,086 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 09:29:35,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked.
[2022-01-10 09:29:35,356 INFO  L328         TraceCheckSpWp]: Computing backward predicates...