/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c


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


This is Ultimate 0.2.2-dev-34549b5
[2022-04-06 10:57:47,418 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-04-06 10:57:47,420 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-06 10:57:47,446 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-06 10:57:47,446 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-06 10:57:47,447 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-06 10:57:47,448 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-06 10:57:47,449 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-06 10:57:47,450 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-06 10:57:47,450 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-04-06 10:57:47,451 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-04-06 10:57:47,451 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-06 10:57:47,452 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-06 10:57:47,452 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-06 10:57:47,453 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-06 10:57:47,453 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-06 10:57:47,454 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-06 10:57:47,454 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-06 10:57:47,456 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-06 10:57:47,457 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-06 10:57:47,458 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-06 10:57:47,458 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-06 10:57:47,459 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-06 10:57:47,460 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-04-06 10:57:47,460 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-06 10:57:47,462 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-06 10:57:47,462 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-06 10:57:47,462 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-06 10:57:47,463 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-06 10:57:47,463 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-06 10:57:47,464 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-06 10:57:47,464 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-06 10:57:47,464 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-06 10:57:47,465 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-06 10:57:47,465 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-06 10:57:47,466 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-06 10:57:47,466 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-04-06 10:57:47,466 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-04-06 10:57:47,467 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-04-06 10:57:47,467 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-04-06 10:57:47,467 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-04-06 10:57:47,468 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-04-06 10:57:47,468 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf
[2022-04-06 10:57:47,482 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-04-06 10:57:47,483 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-06 10:57:47,483 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-04-06 10:57:47,483 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-04-06 10:57:47,484 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-04-06 10:57:47,484 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-04-06 10:57:47,484 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-04-06 10:57:47,485 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 10:57:47,485 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-06 10:57:47,485 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-04-06 10:57:47,486 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-04-06 10:57:47,486 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-04-06 10:57:47,487 INFO  L138        SettingsManager]:  * TransformationType=LOOP_ACCELERATION_QVASR
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-06 10:57:47,639 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-06 10:57:47,656 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-06 10:57:47,658 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-06 10:57:47,659 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-04-06 10:57:47,659 INFO  L275        PluginConnector]: CDTParser initialized
[2022-04-06 10:57:47,660 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c
[2022-04-06 10:57:47,705 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954269bab/3091e6d8dc4245fab09e7afdeb3ee563/FLAG92602cf2f
[2022-04-06 10:57:48,054 INFO  L306              CDTParser]: Found 1 translation units.
[2022-04-06 10:57:48,055 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c
[2022-04-06 10:57:48,062 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954269bab/3091e6d8dc4245fab09e7afdeb3ee563/FLAG92602cf2f
[2022-04-06 10:57:48,070 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954269bab/3091e6d8dc4245fab09e7afdeb3ee563
[2022-04-06 10:57:48,072 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-06 10:57:48,073 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-04-06 10:57:48,074 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-06 10:57:48,074 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-06 10:57:48,082 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-06 10:57:48,082 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,083 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3facf30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48, skipping insertion in model container
[2022-04-06 10:57:48,083 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,087 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-04-06 10:57:48,095 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-04-06 10:57:48,210 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610]
[2022-04-06 10:57:48,221 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 10:57:48,242 INFO  L203         MainTranslator]: Completed pre-run
[2022-04-06 10:57:48,249 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c[597,610]
[2022-04-06 10:57:48,254 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-04-06 10:57:48,264 INFO  L208         MainTranslator]: Completed translation
[2022-04-06 10:57:48,264 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48 WrapperNode
[2022-04-06 10:57:48,266 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-06 10:57:48,267 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-06 10:57:48,267 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-06 10:57:48,267 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-04-06 10:57:48,274 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,274 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,278 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,278 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,280 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,282 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,283 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,284 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-06 10:57:48,284 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-06 10:57:48,284 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-04-06 10:57:48,284 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-04-06 10:57:48,285 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,301 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 10:57:48,307 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:48,315 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)
[2022-04-06 10:57:48,316 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
[2022-04-06 10:57:48,359 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-06 10:57:48,359 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-06 10:57:48,359 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-06 10:57:48,359 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-06 10:57:48,359 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-06 10:57:48,360 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-04-06 10:57:48,360 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-06 10:57:48,361 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-04-06 10:57:48,362 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-04-06 10:57:48,364 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-06 10:57:48,407 INFO  L234             CfgBuilder]: Building ICFG
[2022-04-06 10:57:48,408 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-06 10:57:48,548 INFO  L275             CfgBuilder]: Performing block encoding
[2022-04-06 10:57:48,553 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-06 10:57:48,553 INFO  L299             CfgBuilder]: Removed 1 assume(true) statements.
[2022-04-06 10:57:48,554 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:48 BoogieIcfgContainer
[2022-04-06 10:57:48,554 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-06 10:57:48,554 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-04-06 10:57:48,554 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-04-06 10:57:48,555 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-04-06 10:57:48,557 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:48" (1/1) ...
[2022-04-06 10:57:48,558 INFO  L168   ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR
[2022-04-06 10:57:48,568 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:57:48 BasicIcfg
[2022-04-06 10:57:48,568 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-04-06 10:57:48,569 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-06 10:57:48,569 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-04-06 10:57:48,571 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-04-06 10:57:48,571 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:57:48" (1/4) ...
[2022-04-06 10:57:48,571 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30546273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:57:48, skipping insertion in model container
[2022-04-06 10:57:48,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:48" (2/4) ...
[2022-04-06 10:57:48,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30546273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:57:48, skipping insertion in model container
[2022-04-06 10:57:48,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:48" (3/4) ...
[2022-04-06 10:57:48,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30546273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:57:48, skipping insertion in model container
[2022-04-06 10:57:48,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:57:48" (4/4) ...
[2022-04-06 10:57:48,573 INFO  L111   eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.cqvasr
[2022-04-06 10:57:48,576 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-04-06 10:57:48,576 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-06 10:57:48,602 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-06 10:57:48,606 INFO  L340      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=FINITE_AUTOMATA, 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
[2022-04-06 10:57:48,607 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-06 10:57:48,616 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 10:57:48,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-04-06 10:57:48,619 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:48,619 INFO  L499         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:48,619 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:48,622 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:48,622 INFO  L85        PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times
[2022-04-06 10:57:48,628 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:48,628 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677246844]
[2022-04-06 10:57:48,628 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:48,628 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:48,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:48,754 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-04-06 10:57:48,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:48,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 10:57:48,768 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:48,768 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677246844]
[2022-04-06 10:57:48,769 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677246844] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 10:57:48,769 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 10:57:48,769 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-04-06 10:57:48,770 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328679030]
[2022-04-06 10:57:48,770 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 10:57:48,774 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-04-06 10:57:48,774 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:48,796 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-04-06 10:57:48,797 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 10:57:48,798 INFO  L87              Difference]: Start difference. First operand  has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 10:57:48,855 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:57:48,855 INFO  L93              Difference]: Finished difference Result 45 states and 58 transitions.
[2022-04-06 10:57:48,857 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-04-06 10:57:48,858 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-04-06 10:57:48,858 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:57:48,866 INFO  L225             Difference]: With dead ends: 45
[2022-04-06 10:57:48,866 INFO  L226             Difference]: Without dead ends: 21
[2022-04-06 10:57:48,868 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-04-06 10:57:48,872 INFO  L913         BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 10:57:48,872 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 10:57:48,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2022-04-06 10:57:48,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20.
[2022-04-06 10:57:48,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-04-06 10:57:48,902 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions.
[2022-04-06 10:57:48,903 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12
[2022-04-06 10:57:48,903 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:57:48,903 INFO  L478      AbstractCegarLoop]: Abstraction has 20 states and 23 transitions.
[2022-04-06 10:57:48,904 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 10:57:48,904 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions.
[2022-04-06 10:57:48,905 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-04-06 10:57:48,905 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:48,905 INFO  L499         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:48,905 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-04-06 10:57:48,906 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:48,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:48,907 INFO  L85        PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times
[2022-04-06 10:57:48,908 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:48,908 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651891225]
[2022-04-06 10:57:48,908 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:48,908 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:48,934 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:57:48,934 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718059492]
[2022-04-06 10:57:48,935 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:48,935 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:48,935 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:48,937 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)
[2022-04-06 10:57:48,938 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-06 10:57:48,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:48,985 INFO  L263         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-04-06 10:57:48,990 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:57:49,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 10:57:49,127 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 10:57:49,128 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:49,128 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651891225]
[2022-04-06 10:57:49,128 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:57:49,129 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718059492]
[2022-04-06 10:57:49,132 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [718059492] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 10:57:49,132 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 10:57:49,132 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-04-06 10:57:49,132 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494676497]
[2022-04-06 10:57:49,133 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 10:57:49,134 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-04-06 10:57:49,134 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:49,135 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-04-06 10:57:49,136 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-04-06 10:57:49,136 INFO  L87              Difference]: Start difference. First operand 20 states and 23 transitions. Second operand  has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 10:57:49,208 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:57:49,209 INFO  L93              Difference]: Finished difference Result 34 states and 40 transitions.
[2022-04-06 10:57:49,209 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-04-06 10:57:49,209 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-04-06 10:57:49,209 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:57:49,210 INFO  L225             Difference]: With dead ends: 34
[2022-04-06 10:57:49,210 INFO  L226             Difference]: Without dead ends: 29
[2022-04-06 10:57:49,211 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-04-06 10:57:49,212 INFO  L913         BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 10:57:49,212 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 10:57:49,213 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2022-04-06 10:57:49,216 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28.
[2022-04-06 10:57:49,216 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 10:57:49,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2022-04-06 10:57:49,217 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12
[2022-04-06 10:57:49,217 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:57:49,217 INFO  L478      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2022-04-06 10:57:49,217 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-04-06 10:57:49,217 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2022-04-06 10:57:49,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-04-06 10:57:49,218 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:49,218 INFO  L499         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:49,237 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-04-06 10:57:49,432 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:49,433 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:49,433 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:49,433 INFO  L85        PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times
[2022-04-06 10:57:49,434 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:49,434 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542707661]
[2022-04-06 10:57:49,434 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:49,434 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:49,441 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:57:49,442 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497884687]
[2022-04-06 10:57:49,442 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:49,451 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:49,452 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:49,456 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)
[2022-04-06 10:57:49,458 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-04-06 10:57:49,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:49,500 INFO  L263         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-04-06 10:57:49,502 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:57:49,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 10:57:49,673 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:57:49,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-04-06 10:57:49,793 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:49,794 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542707661]
[2022-04-06 10:57:49,794 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:57:49,794 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497884687]
[2022-04-06 10:57:49,794 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [497884687] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:57:49,794 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:57:49,794 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11
[2022-04-06 10:57:49,794 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26407351]
[2022-04-06 10:57:49,794 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:57:49,795 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-04-06 10:57:49,795 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:49,795 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-04-06 10:57:49,796 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-04-06 10:57:49,796 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand  has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 10:57:50,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:57:50,018 INFO  L93              Difference]: Finished difference Result 45 states and 52 transitions.
[2022-04-06 10:57:50,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-04-06 10:57:50,019 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22
[2022-04-06 10:57:50,019 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:57:50,019 INFO  L225             Difference]: With dead ends: 45
[2022-04-06 10:57:50,019 INFO  L226             Difference]: Without dead ends: 38
[2022-04-06 10:57:50,020 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210
[2022-04-06 10:57:50,021 INFO  L913         BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-04-06 10:57:50,021 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-04-06 10:57:50,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-04-06 10:57:50,026 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36.
[2022-04-06 10:57:50,026 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 10:57:50,027 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions.
[2022-04-06 10:57:50,027 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22
[2022-04-06 10:57:50,027 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:57:50,027 INFO  L478      AbstractCegarLoop]: Abstraction has 36 states and 40 transitions.
[2022-04-06 10:57:50,027 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-04-06 10:57:50,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions.
[2022-04-06 10:57:50,028 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-04-06 10:57:50,028 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:50,028 INFO  L499         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:50,045 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-04-06 10:57:50,244 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-04-06 10:57:50,244 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:50,244 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:50,244 INFO  L85        PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times
[2022-04-06 10:57:50,244 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:50,245 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378627190]
[2022-04-06 10:57:50,245 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:50,245 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:50,252 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:57:50,252 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107232762]
[2022-04-06 10:57:50,252 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:50,252 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:50,252 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:50,253 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)
[2022-04-06 10:57:50,254 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-04-06 10:57:50,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:50,289 INFO  L263         TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-04-06 10:57:50,290 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:57:50,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 10:57:50,342 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:57:50,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-04-06 10:57:50,398 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:50,398 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378627190]
[2022-04-06 10:57:50,399 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:57:50,399 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107232762]
[2022-04-06 10:57:50,399 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107232762] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:57:50,399 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:57:50,399 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2022-04-06 10:57:50,399 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875998998]
[2022-04-06 10:57:50,399 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:57:50,401 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-04-06 10:57:50,401 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:50,401 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-04-06 10:57:50,401 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2022-04-06 10:57:50,401 INFO  L87              Difference]: Start difference. First operand 36 states and 40 transitions. Second operand  has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4)
[2022-04-06 10:57:50,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:57:50,456 INFO  L93              Difference]: Finished difference Result 77 states and 85 transitions.
[2022-04-06 10:57:50,456 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2022-04-06 10:57:50,456 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23
[2022-04-06 10:57:50,456 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:57:50,457 INFO  L225             Difference]: With dead ends: 77
[2022-04-06 10:57:50,457 INFO  L226             Difference]: Without dead ends: 71
[2022-04-06 10:57:50,457 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-04-06 10:57:50,458 INFO  L913         BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 10:57:50,458 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 10:57:50,459 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2022-04-06 10:57:50,464 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59.
[2022-04-06 10:57:50,464 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-06 10:57:50,465 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions.
[2022-04-06 10:57:50,465 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23
[2022-04-06 10:57:50,465 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:57:50,466 INFO  L478      AbstractCegarLoop]: Abstraction has 59 states and 67 transitions.
[2022-04-06 10:57:50,466 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4)
[2022-04-06 10:57:50,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions.
[2022-04-06 10:57:50,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-04-06 10:57:50,466 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:50,466 INFO  L499         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:50,485 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-04-06 10:57:50,679 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:50,680 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:50,680 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:50,680 INFO  L85        PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times
[2022-04-06 10:57:50,680 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:50,681 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199401314]
[2022-04-06 10:57:50,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:50,681 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:50,690 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:57:50,691 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744363496]
[2022-04-06 10:57:50,691 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:50,691 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:50,691 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:50,692 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 10:57:50,695 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-04-06 10:57:50,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:50,730 INFO  L263         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core
[2022-04-06 10:57:50,731 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:57:50,969 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-04-06 10:57:50,970 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:57:51,337 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-04-06 10:57:51,337 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:51,337 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199401314]
[2022-04-06 10:57:51,338 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:57:51,338 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744363496]
[2022-04-06 10:57:51,338 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744363496] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:57:51,338 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:57:51,338 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22
[2022-04-06 10:57:51,338 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296405821]
[2022-04-06 10:57:51,339 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:57:51,339 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-04-06 10:57:51,339 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:51,339 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-04-06 10:57:51,340 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462
[2022-04-06 10:57:51,340 INFO  L87              Difference]: Start difference. First operand 59 states and 67 transitions. Second operand  has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2022-04-06 10:57:51,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:57:51,794 INFO  L93              Difference]: Finished difference Result 85 states and 98 transitions.
[2022-04-06 10:57:51,794 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2022-04-06 10:57:51,794 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29
[2022-04-06 10:57:51,794 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:57:51,795 INFO  L225             Difference]: With dead ends: 85
[2022-04-06 10:57:51,795 INFO  L226             Difference]: Without dead ends: 77
[2022-04-06 10:57:51,796 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260
[2022-04-06 10:57:51,796 INFO  L913         BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 10:57:51,796 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time]
[2022-04-06 10:57:51,797 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2022-04-06 10:57:51,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67.
[2022-04-06 10:57:51,804 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-04-06 10:57:51,805 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions.
[2022-04-06 10:57:51,805 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29
[2022-04-06 10:57:51,805 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:57:51,805 INFO  L478      AbstractCegarLoop]: Abstraction has 67 states and 76 transitions.
[2022-04-06 10:57:51,805 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2022-04-06 10:57:51,805 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions.
[2022-04-06 10:57:51,806 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2022-04-06 10:57:51,806 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:57:51,806 INFO  L499         BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:57:51,824 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-04-06 10:57:52,022 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:52,022 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:57:52,023 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:57:52,023 INFO  L85        PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times
[2022-04-06 10:57:52,023 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:57:52,023 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266216863]
[2022-04-06 10:57:52,023 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:52,023 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:57:52,029 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:57:52,029 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199619956]
[2022-04-06 10:57:52,029 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:57:52,029 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:57:52,029 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:57:52,031 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 10:57:52,032 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-04-06 10:57:52,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:57:52,099 INFO  L263         TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core
[2022-04-06 10:57:52,101 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:57:52,224 WARN  L907       QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-04-06 10:57:52,226 WARN  L907       QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-04-06 10:57:52,613 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-04-06 10:57:52,613 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:57:52,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2022-04-06 10:57:52,871 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:57:52,871 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266216863]
[2022-04-06 10:57:52,871 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:57:52,871 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199619956]
[2022-04-06 10:57:52,871 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199619956] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:57:52,871 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:57:52,871 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18
[2022-04-06 10:57:52,871 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46500264]
[2022-04-06 10:57:52,872 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:57:52,872 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-04-06 10:57:52,872 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:57:52,872 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-04-06 10:57:52,872 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306
[2022-04-06 10:57:52,872 INFO  L87              Difference]: Start difference. First operand 67 states and 76 transitions. Second operand  has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-06 10:57:55,028 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-06 10:57:59,088 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-06 10:58:01,102 WARN  L534   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-06 10:58:03,486 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:58:03,486 INFO  L93              Difference]: Finished difference Result 96 states and 113 transitions.
[2022-04-06 10:58:03,486 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2022-04-06 10:58:03,486 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39
[2022-04-06 10:58:03,487 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:58:03,488 INFO  L225             Difference]: With dead ends: 96
[2022-04-06 10:58:03,488 INFO  L226             Difference]: Without dead ends: 90
[2022-04-06 10:58:03,488 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552
[2022-04-06 10:58:03,489 INFO  L913         BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time
[2022-04-06 10:58:03,489 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 154 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time]
[2022-04-06 10:58:03,490 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2022-04-06 10:58:03,504 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88.
[2022-04-06 10:58:03,504 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-04-06 10:58:03,505 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions.
[2022-04-06 10:58:03,505 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39
[2022-04-06 10:58:03,505 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:58:03,505 INFO  L478      AbstractCegarLoop]: Abstraction has 88 states and 104 transitions.
[2022-04-06 10:58:03,505 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-06 10:58:03,505 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions.
[2022-04-06 10:58:03,506 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2022-04-06 10:58:03,506 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:58:03,506 INFO  L499         BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:58:03,529 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-04-06 10:58:03,706 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:03,707 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:58:03,707 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:58:03,707 INFO  L85        PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times
[2022-04-06 10:58:03,707 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:58:03,708 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946273545]
[2022-04-06 10:58:03,708 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:58:03,708 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:58:03,713 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:58:03,714 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71637246]
[2022-04-06 10:58:03,714 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:58:03,714 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:03,714 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:58:03,720 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 10:58:03,721 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-04-06 10:58:03,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 10:58:03,755 INFO  L263         TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-06 10:58:03,756 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:58:03,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-04-06 10:58:03,893 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:58:04,038 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-04-06 10:58:04,039 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:58:04,039 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946273545]
[2022-04-06 10:58:04,039 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:58:04,039 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71637246]
[2022-04-06 10:58:04,039 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [71637246] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:58:04,039 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:58:04,039 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2022-04-06 10:58:04,039 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367386696]
[2022-04-06 10:58:04,039 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:58:04,040 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-04-06 10:58:04,040 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:58:04,040 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-04-06 10:58:04,040 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2022-04-06 10:58:04,040 INFO  L87              Difference]: Start difference. First operand 88 states and 104 transitions. Second operand  has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-04-06 10:58:04,171 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:58:04,172 INFO  L93              Difference]: Finished difference Result 97 states and 113 transitions.
[2022-04-06 10:58:04,172 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-04-06 10:58:04,172 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39
[2022-04-06 10:58:04,172 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:58:04,173 INFO  L225             Difference]: With dead ends: 97
[2022-04-06 10:58:04,173 INFO  L226             Difference]: Without dead ends: 91
[2022-04-06 10:58:04,173 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240
[2022-04-06 10:58:04,174 INFO  L913         BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 10:58:04,174 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 10:58:04,174 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2022-04-06 10:58:04,182 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83.
[2022-04-06 10:58:04,182 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-04-06 10:58:04,184 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions.
[2022-04-06 10:58:04,184 INFO  L78                 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39
[2022-04-06 10:58:04,184 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:58:04,184 INFO  L478      AbstractCegarLoop]: Abstraction has 83 states and 97 transitions.
[2022-04-06 10:58:04,184 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-04-06 10:58:04,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions.
[2022-04-06 10:58:04,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-04-06 10:58:04,187 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:58:04,188 INFO  L499         BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:58:04,209 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-04-06 10:58:04,388 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:04,388 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:58:04,389 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:58:04,389 INFO  L85        PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times
[2022-04-06 10:58:04,389 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:58:04,389 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406710395]
[2022-04-06 10:58:04,389 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:58:04,389 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:58:04,394 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:58:04,395 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640956918]
[2022-04-06 10:58:04,395 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-06 10:58:04,395 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:04,395 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:58:04,398 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 10:58:04,399 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-04-06 10:58:04,441 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-04-06 10:58:04,442 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 10:58:04,442 INFO  L263         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-06 10:58:04,446 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:58:04,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-04-06 10:58:04,598 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 10:58:04,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-04-06 10:58:04,747 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 10:58:04,747 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406710395]
[2022-04-06 10:58:04,747 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 10:58:04,747 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640956918]
[2022-04-06 10:58:04,747 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640956918] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 10:58:04,747 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 10:58:04,747 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14
[2022-04-06 10:58:04,748 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874110533]
[2022-04-06 10:58:04,748 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 10:58:04,748 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2022-04-06 10:58:04,748 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 10:58:04,748 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2022-04-06 10:58:04,748 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182
[2022-04-06 10:58:04,749 INFO  L87              Difference]: Start difference. First operand 83 states and 97 transitions. Second operand  has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-04-06 10:58:04,890 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 10:58:04,890 INFO  L93              Difference]: Finished difference Result 108 states and 127 transitions.
[2022-04-06 10:58:04,890 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-04-06 10:58:04,891 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49
[2022-04-06 10:58:04,891 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 10:58:04,891 INFO  L225             Difference]: With dead ends: 108
[2022-04-06 10:58:04,891 INFO  L226             Difference]: Without dead ends: 102
[2022-04-06 10:58:04,892 INFO  L912         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272
[2022-04-06 10:58:04,892 INFO  L913         BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 10:58:04,892 INFO  L914         BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 10:58:04,893 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2022-04-06 10:58:04,901 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89.
[2022-04-06 10:58:04,901 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2022-04-06 10:58:04,902 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions.
[2022-04-06 10:58:04,902 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49
[2022-04-06 10:58:04,902 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-04-06 10:58:04,902 INFO  L478      AbstractCegarLoop]: Abstraction has 89 states and 105 transitions.
[2022-04-06 10:58:04,902 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-04-06 10:58:04,902 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions.
[2022-04-06 10:58:04,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-04-06 10:58:04,903 INFO  L491         BasicCegarLoop]: Found error trace
[2022-04-06 10:58:04,903 INFO  L499         BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 10:58:04,924 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-04-06 10:58:05,122 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:05,123 INFO  L403      AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 10:58:05,123 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 10:58:05,123 INFO  L85        PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times
[2022-04-06 10:58:05,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 10:58:05,123 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533443295]
[2022-04-06 10:58:05,123 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 10:58:05,124 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 10:58:05,136 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 10:58:05,136 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975555514]
[2022-04-06 10:58:05,138 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-04-06 10:58:05,138 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 10:58:05,138 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 10:58:05,142 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 10:58:05,143 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-04-06 10:58:05,705 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2022-04-06 10:58:05,705 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-04-06 10:58:05,706 INFO  L263         TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-04-06 10:58:05,709 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 10:58:05,801 WARN  L907       QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-04-06 10:58:05,806 WARN  L907       QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-04-06 10:58:05,807 WARN  L907       QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful
[2022-04-06 10:58:09,571 WARN  L833   $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false