./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 3a877d22
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4
--- Real Ultimate output ---
This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2
[2021-12-15 08:42:30,710 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-12-15 08:42:30,712 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-12-15 08:42:30,761 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-12-15 08:42:30,763 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-12-15 08:42:30,765 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-12-15 08:42:30,767 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-12-15 08:42:30,771 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-12-15 08:42:30,772 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-12-15 08:42:30,775 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-12-15 08:42:30,776 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-12-15 08:42:30,777 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-12-15 08:42:30,777 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-12-15 08:42:30,779 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-12-15 08:42:30,780 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-12-15 08:42:30,783 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-12-15 08:42:30,784 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-12-15 08:42:30,784 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-12-15 08:42:30,787 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-12-15 08:42:30,788 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-12-15 08:42:30,791 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-12-15 08:42:30,791 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-12-15 08:42:30,793 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-12-15 08:42:30,793 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-12-15 08:42:30,808 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-12-15 08:42:30,810 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-12-15 08:42:30,811 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-12-15 08:42:30,812 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-12-15 08:42:30,812 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-12-15 08:42:30,813 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-12-15 08:42:30,813 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-12-15 08:42:30,814 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-12-15 08:42:30,815 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-12-15 08:42:30,816 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-12-15 08:42:30,816 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-12-15 08:42:30,817 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-12-15 08:42:30,817 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-12-15 08:42:30,818 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-12-15 08:42:30,818 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-12-15 08:42:30,819 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-12-15 08:42:30,819 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-12-15 08:42:30,820 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-12-15 08:42:30,844 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-12-15 08:42:30,844 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-12-15 08:42:30,844 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-12-15 08:42:30,845 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-12-15 08:42:30,845 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-12-15 08:42:30,845 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-12-15 08:42:30,846 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-12-15 08:42:30,846 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-12-15 08:42:30,846 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-12-15 08:42:30,846 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-12-15 08:42:30,847 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-12-15 08:42:30,847 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-12-15 08:42:30,847 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-12-15 08:42:30,847 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-12-15 08:42:30,848 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-12-15 08:42:30,849 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-12-15 08:42:30,849 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-12-15 08:42:30,849 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-12-15 08:42:30,849 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-15 08:42:30,849 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-12-15 08:42:30,849 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2021-12-15 08:42:30,851 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-12-15 08:42:30,852 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-12-15 08:42:30,852 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/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.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ea5dd3dcdb2ca45816b1054e161d4e883537a3d70de7c4c731596cc44c337d4
[2021-12-15 08:42:31,042 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-12-15 08:42:31,061 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-12-15 08:42:31,064 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-12-15 08:42:31,065 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-12-15 08:42:31,065 INFO  L275        PluginConnector]: CDTParser initialized
[2021-12-15 08:42:31,066 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m5.c
[2021-12-15 08:42:31,115 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04424fe4/778bd7a5013049518e153f427f0e5708/FLAG4c6a9f0c2
[2021-12-15 08:42:31,463 INFO  L306              CDTParser]: Found 1 translation units.
[2021-12-15 08:42:31,464 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c
[2021-12-15 08:42:31,471 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04424fe4/778bd7a5013049518e153f427f0e5708/FLAG4c6a9f0c2
[2021-12-15 08:42:31,485 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04424fe4/778bd7a5013049518e153f427f0e5708
[2021-12-15 08:42:31,486 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-12-15 08:42:31,488 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-12-15 08:42:31,490 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-12-15 08:42:31,490 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-12-15 08:42:31,493 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-12-15 08:42:31,493 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,494 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687f377e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31, skipping insertion in model container
[2021-12-15 08:42:31,494 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,498 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-12-15 08:42:31,512 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-12-15 08:42:31,625 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421]
[2021-12-15 08:42:31,663 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-15 08:42:31,670 INFO  L203         MainTranslator]: Completed pre-run
[2021-12-15 08:42:31,680 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m5.c[408,421]
[2021-12-15 08:42:31,701 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2021-12-15 08:42:31,711 INFO  L208         MainTranslator]: Completed translation
[2021-12-15 08:42:31,712 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31 WrapperNode
[2021-12-15 08:42:31,712 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-12-15 08:42:31,713 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-12-15 08:42:31,713 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-12-15 08:42:31,713 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-12-15 08:42:31,718 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,729 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,756 INFO  L137                Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148
[2021-12-15 08:42:31,757 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-12-15 08:42:31,758 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-12-15 08:42:31,758 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-12-15 08:42:31,758 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-12-15 08:42:31,763 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,763 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,772 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,772 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,783 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,786 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,786 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,788 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-12-15 08:42:31,788 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-12-15 08:42:31,788 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-12-15 08:42:31,788 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-12-15 08:42:31,794 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (1/1) ...
[2021-12-15 08:42:31,799 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-12-15 08:42:31,806 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-15 08:42:31,816 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)
[2021-12-15 08:42:31,847 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
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-12-15 08:42:31,855 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-12-15 08:42:31,855 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2021-12-15 08:42:31,907 INFO  L236             CfgBuilder]: Building ICFG
[2021-12-15 08:42:31,909 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2021-12-15 08:42:32,094 INFO  L277             CfgBuilder]: Performing block encoding
[2021-12-15 08:42:32,098 INFO  L296             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-12-15 08:42:32,099 INFO  L301             CfgBuilder]: Removed 11 assume(true) statements.
[2021-12-15 08:42:32,100 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:42:32 BoogieIcfgContainer
[2021-12-15 08:42:32,100 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-12-15 08:42:32,101 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-12-15 08:42:32,101 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-12-15 08:42:32,104 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-12-15 08:42:32,104 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:42:31" (1/3) ...
[2021-12-15 08:42:32,105 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319911b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:42:32, skipping insertion in model container
[2021-12-15 08:42:32,105 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:42:31" (2/3) ...
[2021-12-15 08:42:32,105 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319911b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:42:32, skipping insertion in model container
[2021-12-15 08:42:32,105 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:42:32" (3/3) ...
[2021-12-15 08:42:32,106 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c
[2021-12-15 08:42:32,111 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-12-15 08:42:32,112 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-12-15 08:42:32,167 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-12-15 08:42:32,173 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
[2021-12-15 08:42:32,173 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-12-15 08:42:32,188 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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)
[2021-12-15 08:42:32,197 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2021-12-15 08:42:32,197 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:32,198 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:32,198 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:32,202 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:32,202 INFO  L85        PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times
[2021-12-15 08:42:32,208 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:32,208 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973727324]
[2021-12-15 08:42:32,208 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:32,209 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:32,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:32,328 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-15 08:42:32,329 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:32,329 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973727324]
[2021-12-15 08:42:32,330 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973727324] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-15 08:42:32,330 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-15 08:42:32,330 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-12-15 08:42:32,331 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462505462]
[2021-12-15 08:42:32,332 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-15 08:42:32,334 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-12-15 08:42:32,334 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-15 08:42:32,356 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-12-15 08:42:32,357 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-12-15 08:42:32,358 INFO  L87              Difference]: Start difference. First operand  has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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)
[2021-12-15 08:42:32,376 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-15 08:42:32,377 INFO  L93              Difference]: Finished difference Result 83 states and 126 transitions.
[2021-12-15 08:42:32,377 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2021-12-15 08:42:32,379 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27
[2021-12-15 08:42:32,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-15 08:42:32,384 INFO  L225             Difference]: With dead ends: 83
[2021-12-15 08:42:32,384 INFO  L226             Difference]: Without dead ends: 39
[2021-12-15 08:42:32,386 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
[2021-12-15 08:42:32,390 INFO  L933         BasicCegarLoop]: 55 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, 55 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
[2021-12-15 08:42:32,390 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2021-12-15 08:42:32,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2021-12-15 08:42:32,413 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2021-12-15 08:42:32,414 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 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)
[2021-12-15 08:42:32,415 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions.
[2021-12-15 08:42:32,416 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27
[2021-12-15 08:42:32,416 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-15 08:42:32,416 INFO  L470      AbstractCegarLoop]: Abstraction has 39 states and 49 transitions.
[2021-12-15 08:42:32,416 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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)
[2021-12-15 08:42:32,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions.
[2021-12-15 08:42:32,418 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2021-12-15 08:42:32,418 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:32,418 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:32,418 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-12-15 08:42:32,419 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:32,420 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:32,421 INFO  L85        PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times
[2021-12-15 08:42:32,421 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:32,421 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897941555]
[2021-12-15 08:42:32,422 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:32,422 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:32,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:32,538 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-15 08:42:32,538 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:32,539 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897941555]
[2021-12-15 08:42:32,539 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897941555] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-15 08:42:32,540 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-15 08:42:32,540 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-12-15 08:42:32,540 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962995068]
[2021-12-15 08:42:32,540 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-15 08:42:32,542 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-12-15 08:42:32,543 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-15 08:42:32,544 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-12-15 08:42:32,544 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-12-15 08:42:32,544 INFO  L87              Difference]: Start difference. First operand 39 states and 49 transitions. Second operand  has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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)
[2021-12-15 08:42:32,633 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-15 08:42:32,633 INFO  L93              Difference]: Finished difference Result 75 states and 95 transitions.
[2021-12-15 08:42:32,633 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-12-15 08:42:32,634 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27
[2021-12-15 08:42:32,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-15 08:42:32,634 INFO  L225             Difference]: With dead ends: 75
[2021-12-15 08:42:32,634 INFO  L226             Difference]: Without dead ends: 41
[2021-12-15 08:42:32,635 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
[2021-12-15 08:42:32,636 INFO  L933         BasicCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2021-12-15 08:42:32,636 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2021-12-15 08:42:32,639 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2021-12-15 08:42:32,641 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40.
[2021-12-15 08:42:32,643 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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)
[2021-12-15 08:42:32,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions.
[2021-12-15 08:42:32,644 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27
[2021-12-15 08:42:32,644 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-15 08:42:32,644 INFO  L470      AbstractCegarLoop]: Abstraction has 40 states and 50 transitions.
[2021-12-15 08:42:32,645 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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)
[2021-12-15 08:42:32,645 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions.
[2021-12-15 08:42:32,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2021-12-15 08:42:32,647 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:32,647 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:32,647 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-12-15 08:42:32,648 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:32,648 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:32,648 INFO  L85        PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times
[2021-12-15 08:42:32,648 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:32,649 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136285323]
[2021-12-15 08:42:32,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:32,649 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:32,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:32,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-12-15 08:42:32,692 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:32,692 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136285323]
[2021-12-15 08:42:32,692 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136285323] provided 1 perfect and 0 imperfect interpolant sequences
[2021-12-15 08:42:32,692 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-12-15 08:42:32,692 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-12-15 08:42:32,692 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624871867]
[2021-12-15 08:42:32,693 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-12-15 08:42:32,693 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-12-15 08:42:32,693 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-15 08:42:32,694 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-12-15 08:42:32,694 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-15 08:42:32,694 INFO  L87              Difference]: Start difference. First operand 40 states and 50 transitions. Second operand  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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)
[2021-12-15 08:42:32,790 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-15 08:42:32,791 INFO  L93              Difference]: Finished difference Result 92 states and 120 transitions.
[2021-12-15 08:42:32,791 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-12-15 08:42:32,791 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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
[2021-12-15 08:42:32,791 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-15 08:42:32,792 INFO  L225             Difference]: With dead ends: 92
[2021-12-15 08:42:32,792 INFO  L226             Difference]: Without dead ends: 61
[2021-12-15 08:42:32,793 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-12-15 08:42:32,793 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2021-12-15 08:42:32,794 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2021-12-15 08:42:32,794 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2021-12-15 08:42:32,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50.
[2021-12-15 08:42:32,798 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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)
[2021-12-15 08:42:32,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions.
[2021-12-15 08:42:32,799 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29
[2021-12-15 08:42:32,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-15 08:42:32,800 INFO  L470      AbstractCegarLoop]: Abstraction has 50 states and 60 transitions.
[2021-12-15 08:42:32,800 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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)
[2021-12-15 08:42:32,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions.
[2021-12-15 08:42:32,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2021-12-15 08:42:32,809 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:32,810 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:32,810 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-12-15 08:42:32,810 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:32,811 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:32,811 INFO  L85        PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times
[2021-12-15 08:42:32,811 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:32,811 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025449660]
[2021-12-15 08:42:32,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:32,812 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:32,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:32,869 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2021-12-15 08:42:32,870 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:32,870 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025449660]
[2021-12-15 08:42:32,870 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025449660] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-15 08:42:32,871 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95944304]
[2021-12-15 08:42:32,871 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:32,871 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-15 08:42:32,871 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-15 08:42:32,872 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)
[2021-12-15 08:42:32,873 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-12-15 08:42:32,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:32,939 INFO  L263         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core
[2021-12-15 08:42:32,946 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-15 08:42:33,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2021-12-15 08:42:33,074 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-12-15 08:42:33,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2021-12-15 08:42:33,163 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [95944304] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-15 08:42:33,163 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-15 08:42:33,163 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2021-12-15 08:42:33,164 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428426674]
[2021-12-15 08:42:33,164 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-15 08:42:33,164 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2021-12-15 08:42:33,164 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-15 08:42:33,165 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-12-15 08:42:33,165 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42
[2021-12-15 08:42:33,165 INFO  L87              Difference]: Start difference. First operand 50 states and 60 transitions. Second operand  has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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)
[2021-12-15 08:42:33,264 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-15 08:42:33,264 INFO  L93              Difference]: Finished difference Result 97 states and 117 transitions.
[2021-12-15 08:42:33,265 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-12-15 08:42:33,265 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 49
[2021-12-15 08:42:33,265 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-15 08:42:33,266 INFO  L225             Difference]: With dead ends: 97
[2021-12-15 08:42:33,266 INFO  L226             Difference]: Without dead ends: 53
[2021-12-15 08:42:33,267 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42
[2021-12-15 08:42:33,272 INFO  L933         BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2021-12-15 08:42:33,273 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2021-12-15 08:42:33,275 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2021-12-15 08:42:33,284 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52.
[2021-12-15 08:42:33,286 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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)
[2021-12-15 08:42:33,287 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions.
[2021-12-15 08:42:33,288 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49
[2021-12-15 08:42:33,288 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-15 08:42:33,288 INFO  L470      AbstractCegarLoop]: Abstraction has 52 states and 62 transitions.
[2021-12-15 08:42:33,289 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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)
[2021-12-15 08:42:33,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions.
[2021-12-15 08:42:33,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2021-12-15 08:42:33,290 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:33,290 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:33,308 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2021-12-15 08:42:33,506 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-15 08:42:33,506 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:33,507 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:33,507 INFO  L85        PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times
[2021-12-15 08:42:33,507 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:33,507 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061208754]
[2021-12-15 08:42:33,507 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:33,507 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:33,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:33,566 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2021-12-15 08:42:33,566 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:33,566 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061208754]
[2021-12-15 08:42:33,567 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061208754] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-15 08:42:33,567 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317386152]
[2021-12-15 08:42:33,567 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-12-15 08:42:33,567 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-15 08:42:33,567 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-15 08:42:33,568 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)
[2021-12-15 08:42:33,569 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-12-15 08:42:33,615 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-12-15 08:42:33,615 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-15 08:42:33,616 INFO  L263         TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core
[2021-12-15 08:42:33,617 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-15 08:42:33,709 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2021-12-15 08:42:33,709 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-12-15 08:42:33,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2021-12-15 08:42:33,799 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [317386152] provided 0 perfect and 2 imperfect interpolant sequences
[2021-12-15 08:42:33,799 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2021-12-15 08:42:33,799 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8
[2021-12-15 08:42:33,800 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778310721]
[2021-12-15 08:42:33,800 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2021-12-15 08:42:33,801 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-12-15 08:42:33,801 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-12-15 08:42:33,802 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-12-15 08:42:33,802 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2021-12-15 08:42:33,802 INFO  L87              Difference]: Start difference. First operand 52 states and 62 transitions. Second operand  has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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)
[2021-12-15 08:42:33,925 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-12-15 08:42:33,925 INFO  L93              Difference]: Finished difference Result 123 states and 151 transitions.
[2021-12-15 08:42:33,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-12-15 08:42:33,926 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 51
[2021-12-15 08:42:33,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-12-15 08:42:33,926 INFO  L225             Difference]: With dead ends: 123
[2021-12-15 08:42:33,926 INFO  L226             Difference]: Without dead ends: 83
[2021-12-15 08:42:33,927 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72
[2021-12-15 08:42:33,927 INFO  L933         BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2021-12-15 08:42:33,928 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 22 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2021-12-15 08:42:33,928 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2021-12-15 08:42:33,931 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72.
[2021-12-15 08:42:33,931 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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)
[2021-12-15 08:42:33,932 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions.
[2021-12-15 08:42:33,932 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51
[2021-12-15 08:42:33,932 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-12-15 08:42:33,932 INFO  L470      AbstractCegarLoop]: Abstraction has 72 states and 82 transitions.
[2021-12-15 08:42:33,932 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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)
[2021-12-15 08:42:33,932 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions.
[2021-12-15 08:42:33,933 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2021-12-15 08:42:33,933 INFO  L506         BasicCegarLoop]: Found error trace
[2021-12-15 08:42:33,933 INFO  L514         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-12-15 08:42:33,953 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-12-15 08:42:34,148 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-15 08:42:34,148 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-12-15 08:42:34,149 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-12-15 08:42:34,149 INFO  L85        PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times
[2021-12-15 08:42:34,149 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-12-15 08:42:34,149 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986634278]
[2021-12-15 08:42:34,149 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-12-15 08:42:34,149 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-12-15 08:42:34,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-12-15 08:42:36,435 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-15 08:42:36,436 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-12-15 08:42:36,436 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986634278]
[2021-12-15 08:42:36,436 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986634278] provided 0 perfect and 1 imperfect interpolant sequences
[2021-12-15 08:42:36,436 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696881274]
[2021-12-15 08:42:36,436 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-12-15 08:42:36,436 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-12-15 08:42:36,436 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-12-15 08:42:36,437 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)
[2021-12-15 08:42:36,438 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-12-15 08:42:36,488 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2021-12-15 08:42:36,488 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-12-15 08:42:36,490 WARN  L261         TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 103 conjunts are in the unsatisfiable core
[2021-12-15 08:42:36,501 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-12-15 08:42:36,675 INFO  L388             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11
[2021-12-15 08:42:55,250 INFO  L173   IndexEqualityManager]: detected equality via solver
[2021-12-15 08:42:55,251 INFO  L173   IndexEqualityManager]: detected equality via solver
[2021-12-15 08:42:55,251 INFO  L173   IndexEqualityManager]: detected equality via solver
[2021-12-15 08:42:55,260 INFO  L354             Elim1Store]: treesize reduction 9, result has 52.6 percent of original size
[2021-12-15 08:42:55,261 INFO  L388             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 18
[2021-12-15 08:42:55,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-12-15 08:42:55,422 INFO  L328         TraceCheckSpWp]: Computing backward predicates...