./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 6c24879c
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_m4.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 aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955
--- Real Ultimate output ---
This is Ultimate 0.2.2-?-6c24879
[2022-07-11 22:46:56,577 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-07-11 22:46:56,579 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-07-11 22:46:56,601 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-07-11 22:46:56,602 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-07-11 22:46:56,603 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-07-11 22:46:56,606 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-07-11 22:46:56,609 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-07-11 22:46:56,611 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-07-11 22:46:56,614 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-07-11 22:46:56,615 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-07-11 22:46:56,617 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-07-11 22:46:56,617 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-07-11 22:46:56,619 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-07-11 22:46:56,620 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-07-11 22:46:56,621 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-07-11 22:46:56,621 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-07-11 22:46:56,622 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-07-11 22:46:56,624 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-07-11 22:46:56,628 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-07-11 22:46:56,630 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-07-11 22:46:56,630 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-07-11 22:46:56,631 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-07-11 22:46:56,632 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-07-11 22:46:56,633 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-07-11 22:46:56,638 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-07-11 22:46:56,638 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-07-11 22:46:56,639 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-07-11 22:46:56,639 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-07-11 22:46:56,640 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-07-11 22:46:56,640 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-07-11 22:46:56,641 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-07-11 22:46:56,642 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-07-11 22:46:56,642 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-07-11 22:46:56,643 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-07-11 22:46:56,643 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-07-11 22:46:56,643 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-07-11 22:46:56,644 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-07-11 22:46:56,644 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-07-11 22:46:56,644 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-07-11 22:46:56,645 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-07-11 22:46:56,646 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-07-11 22:46:56,647 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-07-11 22:46:56,674 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-07-11 22:46:56,674 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-07-11 22:46:56,675 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-07-11 22:46:56,675 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-07-11 22:46:56,675 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-07-11 22:46:56,676 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-07-11 22:46:56,676 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-07-11 22:46:56,676 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-07-11 22:46:56,676 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-07-11 22:46:56,677 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-07-11 22:46:56,677 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-07-11 22:46:56,677 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-07-11 22:46:56,677 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-07-11 22:46:56,678 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-07-11 22:46:56,679 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-07-11 22:46:56,679 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-07-11 22:46:56,679 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-07-11 22:46:56,679 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-07-11 22:46:56,680 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-11 22:46:56,680 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-07-11 22:46:56,680 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-07-11 22:46:56,680 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-07-11 22:46:56,680 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-07-11 22:46:56,680 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-07-11 22:46:56,681 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-07-11 22:46:56,681 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-07-11 22:46:56,681 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-07-11 22:46:56,681 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 -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955
[2022-07-11 22:46:56,877 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-07-11 22:46:56,900 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-07-11 22:46:56,902 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-07-11 22:46:56,902 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-07-11 22:46:56,903 INFO  L275        PluginConnector]: CDTParser initialized
[2022-07-11 22:46:56,904 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c
[2022-07-11 22:46:56,949 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918e1e3ad/8eb64d6544504d0184fc629e2d5e5450/FLAG1b37e5e62
[2022-07-11 22:46:57,324 INFO  L306              CDTParser]: Found 1 translation units.
[2022-07-11 22:46:57,325 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c
[2022-07-11 22:46:57,329 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918e1e3ad/8eb64d6544504d0184fc629e2d5e5450/FLAG1b37e5e62
[2022-07-11 22:46:57,739 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918e1e3ad/8eb64d6544504d0184fc629e2d5e5450
[2022-07-11 22:46:57,741 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-07-11 22:46:57,742 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-07-11 22:46:57,745 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-07-11 22:46:57,745 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-07-11 22:46:57,747 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-07-11 22:46:57,748 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,748 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e2d1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57, skipping insertion in model container
[2022-07-11 22:46:57,749 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,753 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-07-11 22:46:57,765 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-07-11 22:46:57,853 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_m4.c[408,421]
[2022-07-11 22:46:57,874 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-11 22:46:57,884 INFO  L203         MainTranslator]: Completed pre-run
[2022-07-11 22:46:57,891 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_m4.c[408,421]
[2022-07-11 22:46:57,901 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-07-11 22:46:57,913 INFO  L208         MainTranslator]: Completed translation
[2022-07-11 22:46:57,914 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57 WrapperNode
[2022-07-11 22:46:57,914 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-07-11 22:46:57,915 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-07-11 22:46:57,915 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-07-11 22:46:57,915 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-07-11 22:46:57,919 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,930 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,948 INFO  L137                Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126
[2022-07-11 22:46:57,949 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-07-11 22:46:57,950 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-07-11 22:46:57,950 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-07-11 22:46:57,950 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-07-11 22:46:57,955 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,955 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,958 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,959 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,972 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,977 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,982 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,983 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-07-11 22:46:57,984 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-07-11 22:46:57,985 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-07-11 22:46:57,985 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-07-11 22:46:57,985 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (1/1) ...
[2022-07-11 22:46:57,990 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-07-11 22:46:57,997 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-11 22:46:58,008 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)
[2022-07-11 22:46:58,010 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
[2022-07-11 22:46:58,038 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-07-11 22:46:58,038 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-07-11 22:46:58,038 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-07-11 22:46:58,039 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2022-07-11 22:46:58,039 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-07-11 22:46:58,039 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-07-11 22:46:58,039 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-07-11 22:46:58,085 INFO  L234             CfgBuilder]: Building ICFG
[2022-07-11 22:46:58,086 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-07-11 22:46:58,215 INFO  L275             CfgBuilder]: Performing block encoding
[2022-07-11 22:46:58,219 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-07-11 22:46:58,220 INFO  L299             CfgBuilder]: Removed 9 assume(true) statements.
[2022-07-11 22:46:58,221 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:46:58 BoogieIcfgContainer
[2022-07-11 22:46:58,221 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-07-11 22:46:58,222 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-07-11 22:46:58,222 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-07-11 22:46:58,224 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-07-11 22:46:58,225 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:46:57" (1/3) ...
[2022-07-11 22:46:58,225 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af4d28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:46:58, skipping insertion in model container
[2022-07-11 22:46:58,225 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:46:57" (2/3) ...
[2022-07-11 22:46:58,226 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af4d28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:46:58, skipping insertion in model container
[2022-07-11 22:46:58,226 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:46:58" (3/3) ...
[2022-07-11 22:46:58,227 INFO  L111   eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c
[2022-07-11 22:46:58,236 INFO  L201   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-07-11 22:46:58,237 INFO  L160   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-07-11 22:46:58,267 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-07-11 22:46:58,271 INFO  L357      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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5832ecfe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37b229aa
[2022-07-11 22:46:58,272 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-07-11 22:46:58,275 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 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)
[2022-07-11 22:46:58,279 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-07-11 22:46:58,279 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:58,280 INFO  L195           NwaCegarLoop]: 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]
[2022-07-11 22:46:58,280 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:58,284 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:58,284 INFO  L85        PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times
[2022-07-11 22:46:58,290 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:58,290 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331400424]
[2022-07-11 22:46:58,290 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:58,291 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:58,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:58,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-11 22:46:58,411 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:46:58,412 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331400424]
[2022-07-11 22:46:58,413 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331400424] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-11 22:46:58,413 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-11 22:46:58,414 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-07-11 22:46:58,415 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485354572]
[2022-07-11 22:46:58,415 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-11 22:46:58,420 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-07-11 22:46:58,421 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-11 22:46:58,442 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-07-11 22:46:58,445 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-07-11 22:46:58,447 INFO  L87              Difference]: Start difference. First operand  has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 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 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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)
[2022-07-11 22:46:58,466 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-11 22:46:58,467 INFO  L93              Difference]: Finished difference Result 71 states and 106 transitions.
[2022-07-11 22:46:58,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-07-11 22:46:58,469 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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 23
[2022-07-11 22:46:58,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-11 22:46:58,474 INFO  L225             Difference]: With dead ends: 71
[2022-07-11 22:46:58,474 INFO  L226             Difference]: Without dead ends: 33
[2022-07-11 22:46:58,481 INFO  L412           NwaCegarLoop]: 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
[2022-07-11 22:46:58,484 INFO  L413           NwaCegarLoop]: 47 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, 47 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
[2022-07-11 22:46:58,485 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-11 22:46:58,498 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2022-07-11 22:46:58,508 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2022-07-11 22:46:58,509 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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)
[2022-07-11 22:46:58,510 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions.
[2022-07-11 22:46:58,511 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23
[2022-07-11 22:46:58,511 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-11 22:46:58,511 INFO  L495      AbstractCegarLoop]: Abstraction has 33 states and 41 transitions.
[2022-07-11 22:46:58,512 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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)
[2022-07-11 22:46:58,512 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions.
[2022-07-11 22:46:58,513 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-07-11 22:46:58,513 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:58,513 INFO  L195           NwaCegarLoop]: 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]
[2022-07-11 22:46:58,513 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-07-11 22:46:58,513 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:58,514 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:58,514 INFO  L85        PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times
[2022-07-11 22:46:58,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:58,515 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013770656]
[2022-07-11 22:46:58,515 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:58,515 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:58,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:58,570 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-11 22:46:58,571 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:46:58,571 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013770656]
[2022-07-11 22:46:58,571 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013770656] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-11 22:46:58,571 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-11 22:46:58,571 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-07-11 22:46:58,572 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953995424]
[2022-07-11 22:46:58,572 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-11 22:46:58,573 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-07-11 22:46:58,573 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-11 22:46:58,574 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-07-11 22:46:58,574 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-07-11 22:46:58,574 INFO  L87              Difference]: Start difference. First operand 33 states and 41 transitions. Second operand  has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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)
[2022-07-11 22:46:58,619 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-11 22:46:58,619 INFO  L93              Difference]: Finished difference Result 63 states and 79 transitions.
[2022-07-11 22:46:58,620 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-07-11 22:46:58,620 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23
[2022-07-11 22:46:58,620 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-11 22:46:58,620 INFO  L225             Difference]: With dead ends: 63
[2022-07-11 22:46:58,621 INFO  L226             Difference]: Without dead ends: 35
[2022-07-11 22:46:58,621 INFO  L412           NwaCegarLoop]: 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
[2022-07-11 22:46:58,622 INFO  L413           NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-07-11 22:46:58,622 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-07-11 22:46:58,623 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2022-07-11 22:46:58,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34.
[2022-07-11 22:46:58,630 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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)
[2022-07-11 22:46:58,633 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions.
[2022-07-11 22:46:58,634 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23
[2022-07-11 22:46:58,634 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-11 22:46:58,635 INFO  L495      AbstractCegarLoop]: Abstraction has 34 states and 42 transitions.
[2022-07-11 22:46:58,635 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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)
[2022-07-11 22:46:58,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions.
[2022-07-11 22:46:58,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2022-07-11 22:46:58,637 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:58,637 INFO  L195           NwaCegarLoop]: 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]
[2022-07-11 22:46:58,638 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-07-11 22:46:58,638 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:58,639 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:58,641 INFO  L85        PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times
[2022-07-11 22:46:58,641 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:58,655 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495684265]
[2022-07-11 22:46:58,655 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:58,655 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:58,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:58,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-07-11 22:46:58,693 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:46:58,693 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495684265]
[2022-07-11 22:46:58,693 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495684265] provided 1 perfect and 0 imperfect interpolant sequences
[2022-07-11 22:46:58,694 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-07-11 22:46:58,694 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-07-11 22:46:58,694 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253944118]
[2022-07-11 22:46:58,694 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-07-11 22:46:58,694 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-07-11 22:46:58,695 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-11 22:46:58,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-07-11 22:46:58,695 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-07-11 22:46:58,695 INFO  L87              Difference]: Start difference. First operand 34 states and 42 transitions. Second operand  has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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)
[2022-07-11 22:46:58,795 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-11 22:46:58,795 INFO  L93              Difference]: Finished difference Result 76 states and 98 transitions.
[2022-07-11 22:46:58,796 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-07-11 22:46:58,796 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 25
[2022-07-11 22:46:58,796 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-11 22:46:58,797 INFO  L225             Difference]: With dead ends: 76
[2022-07-11 22:46:58,797 INFO  L226             Difference]: Without dead ends: 51
[2022-07-11 22:46:58,797 INFO  L412           NwaCegarLoop]: 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
[2022-07-11 22:46:58,798 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-07-11 22:46:58,798 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-07-11 22:46:58,799 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2022-07-11 22:46:58,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42.
[2022-07-11 22:46:58,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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)
[2022-07-11 22:46:58,807 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions.
[2022-07-11 22:46:58,807 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25
[2022-07-11 22:46:58,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-11 22:46:58,807 INFO  L495      AbstractCegarLoop]: Abstraction has 42 states and 50 transitions.
[2022-07-11 22:46:58,808 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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)
[2022-07-11 22:46:58,808 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions.
[2022-07-11 22:46:58,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-07-11 22:46:58,808 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:58,809 INFO  L195           NwaCegarLoop]: 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]
[2022-07-11 22:46:58,809 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-07-11 22:46:58,809 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:58,809 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:58,810 INFO  L85        PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times
[2022-07-11 22:46:58,810 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:58,810 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712107520]
[2022-07-11 22:46:58,810 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:58,810 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:58,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:58,908 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-07-11 22:46:58,908 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:46:58,908 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712107520]
[2022-07-11 22:46:58,909 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712107520] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-11 22:46:58,909 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132658484]
[2022-07-11 22:46:58,909 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:58,909 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-11 22:46:58,909 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-11 22:46:58,911 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)
[2022-07-11 22:46:58,916 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-07-11 22:46:58,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:58,976 INFO  L263         TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-07-11 22:46:58,981 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-11 22:46:59,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-07-11 22:46:59,042 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-11 22:46:59,063 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-07-11 22:46:59,063 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132658484] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-11 22:46:59,064 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-11 22:46:59,064 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2022-07-11 22:46:59,064 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145327453]
[2022-07-11 22:46:59,064 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-11 22:46:59,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-07-11 22:46:59,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-11 22:46:59,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-07-11 22:46:59,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42
[2022-07-11 22:46:59,065 INFO  L87              Difference]: Start difference. First operand 42 states and 50 transitions. Second operand  has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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)
[2022-07-11 22:46:59,125 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-11 22:46:59,126 INFO  L93              Difference]: Finished difference Result 81 states and 97 transitions.
[2022-07-11 22:46:59,126 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-07-11 22:46:59,126 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 41
[2022-07-11 22:46:59,126 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-11 22:46:59,127 INFO  L225             Difference]: With dead ends: 81
[2022-07-11 22:46:59,127 INFO  L226             Difference]: Without dead ends: 45
[2022-07-11 22:46:59,127 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42
[2022-07-11 22:46:59,128 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-07-11 22:46:59,128 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-07-11 22:46:59,129 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2022-07-11 22:46:59,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44.
[2022-07-11 22:46:59,132 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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)
[2022-07-11 22:46:59,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions.
[2022-07-11 22:46:59,132 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41
[2022-07-11 22:46:59,132 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-11 22:46:59,132 INFO  L495      AbstractCegarLoop]: Abstraction has 44 states and 52 transitions.
[2022-07-11 22:46:59,133 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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)
[2022-07-11 22:46:59,133 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions.
[2022-07-11 22:46:59,133 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-07-11 22:46:59,134 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:59,134 INFO  L195           NwaCegarLoop]: 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]
[2022-07-11 22:46:59,155 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-07-11 22:46:59,354 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-11 22:46:59,355 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:59,355 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:59,355 INFO  L85        PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times
[2022-07-11 22:46:59,355 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:59,355 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447339977]
[2022-07-11 22:46:59,355 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:59,356 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:59,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:46:59,417 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-07-11 22:46:59,418 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:46:59,418 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447339977]
[2022-07-11 22:46:59,418 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447339977] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-11 22:46:59,418 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043930320]
[2022-07-11 22:46:59,418 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-07-11 22:46:59,418 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-11 22:46:59,418 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-11 22:46:59,419 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)
[2022-07-11 22:46:59,420 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-07-11 22:46:59,463 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-07-11 22:46:59,464 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-11 22:46:59,465 INFO  L263         TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-07-11 22:46:59,471 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-11 22:46:59,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-07-11 22:46:59,523 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-07-11 22:46:59,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-07-11 22:46:59,563 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043930320] provided 0 perfect and 2 imperfect interpolant sequences
[2022-07-11 22:46:59,563 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-07-11 22:46:59,564 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8
[2022-07-11 22:46:59,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412245003]
[2022-07-11 22:46:59,564 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-07-11 22:46:59,564 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-07-11 22:46:59,564 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-07-11 22:46:59,565 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-07-11 22:46:59,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2022-07-11 22:46:59,565 INFO  L87              Difference]: Start difference. First operand 44 states and 52 transitions. Second operand  has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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)
[2022-07-11 22:46:59,654 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-07-11 22:46:59,655 INFO  L93              Difference]: Finished difference Result 101 states and 123 transitions.
[2022-07-11 22:46:59,655 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-07-11 22:46:59,655 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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 43
[2022-07-11 22:46:59,655 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-07-11 22:46:59,656 INFO  L225             Difference]: With dead ends: 101
[2022-07-11 22:46:59,656 INFO  L226             Difference]: Without dead ends: 69
[2022-07-11 22:46:59,656 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72
[2022-07-11 22:46:59,657 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-07-11 22:46:59,657 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-07-11 22:46:59,658 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2022-07-11 22:46:59,661 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60.
[2022-07-11 22:46:59,662 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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)
[2022-07-11 22:46:59,662 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions.
[2022-07-11 22:46:59,662 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43
[2022-07-11 22:46:59,662 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-07-11 22:46:59,663 INFO  L495      AbstractCegarLoop]: Abstraction has 60 states and 68 transitions.
[2022-07-11 22:46:59,663 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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)
[2022-07-11 22:46:59,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions.
[2022-07-11 22:46:59,663 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2022-07-11 22:46:59,664 INFO  L187           NwaCegarLoop]: Found error trace
[2022-07-11 22:46:59,664 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2022-07-11 22:46:59,683 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-07-11 22:46:59,881 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-11 22:46:59,881 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-07-11 22:46:59,881 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-07-11 22:46:59,881 INFO  L85        PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times
[2022-07-11 22:46:59,881 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-07-11 22:46:59,881 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906386029]
[2022-07-11 22:46:59,882 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-07-11 22:46:59,882 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-07-11 22:46:59,970 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-07-11 22:47:01,435 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-11 22:47:01,435 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-07-11 22:47:01,435 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906386029]
[2022-07-11 22:47:01,435 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906386029] provided 0 perfect and 1 imperfect interpolant sequences
[2022-07-11 22:47:01,435 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472930034]
[2022-07-11 22:47:01,435 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-07-11 22:47:01,435 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-07-11 22:47:01,435 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-07-11 22:47:01,437 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)
[2022-07-11 22:47:01,464 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-07-11 22:47:01,511 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-07-11 22:47:01,511 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-07-11 22:47:01,512 INFO  L263         TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 86 conjunts are in the unsatisfiable core
[2022-07-11 22:47:01,515 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-07-11 22:47:01,614 INFO  L390             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
[2022-07-11 22:47:07,127 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2022-07-11 22:47:07,133 INFO  L356             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2022-07-11 22:47:07,134 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31
[2022-07-11 22:47:07,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-07-11 22:47:07,447 INFO  L328         TraceCheckSpWp]: Computing backward predicates...