/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/egcd3-ll.c


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


This is Ultimate 0.2.2-dev-5d317bd
[2022-03-18 22:43:55,376 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-03-18 22:43:55,378 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-03-18 22:43:55,402 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-03-18 22:43:55,402 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-03-18 22:43:55,403 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-03-18 22:43:55,404 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-03-18 22:43:55,406 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-03-18 22:43:55,408 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-03-18 22:43:55,408 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2022-03-18 22:43:55,410 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-03-18 22:43:55,411 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-03-18 22:43:55,411 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-03-18 22:43:55,412 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-03-18 22:43:55,413 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-03-18 22:43:55,414 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-03-18 22:43:55,415 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-03-18 22:43:55,416 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-03-18 22:43:55,418 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-03-18 22:43:55,419 INFO  L181        SettingsManager]: Resetting HornVerifier preferences to default values
[2022-03-18 22:43:55,420 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-03-18 22:43:55,421 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-03-18 22:43:55,422 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-03-18 22:43:55,422 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-03-18 22:43:55,425 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-03-18 22:43:55,425 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-03-18 22:43:55,425 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-03-18 22:43:55,426 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-03-18 22:43:55,426 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-03-18 22:43:55,427 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-03-18 22:43:55,427 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-03-18 22:43:55,428 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-03-18 22:43:55,428 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-03-18 22:43:55,429 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-03-18 22:43:55,430 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-03-18 22:43:55,430 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-03-18 22:43:55,430 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-03-18 22:43:55,431 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-03-18 22:43:55,431 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-03-18 22:43:55,431 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-03-18 22:43:55,432 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-03-18 22:43:55,433 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf
[2022-03-18 22:43:55,453 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-03-18 22:43:55,453 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-03-18 22:43:55,454 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-03-18 22:43:55,454 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-03-18 22:43:55,454 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-03-18 22:43:55,454 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-03-18 22:43:55,454 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-03-18 22:43:55,455 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-03-18 22:43:55,455 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-03-18 22:43:55,455 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-03-18 22:43:55,455 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-03-18 22:43:55,455 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-03-18 22:43:55,455 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-03-18 22:43:55,456 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-03-18 22:43:55,456 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 22:43:55,457 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-03-18 22:43:55,457 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-03-18 22:43:55,458 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-03-18 22:43:55,458 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-03-18 22:43:55,692 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-03-18 22:43:55,720 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-03-18 22:43:55,722 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-03-18 22:43:55,722 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-03-18 22:43:55,724 INFO  L275        PluginConnector]: CDTParser initialized
[2022-03-18 22:43:55,725 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c
[2022-03-18 22:43:55,781 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db/FLAG098866ea1
[2022-03-18 22:43:56,158 INFO  L306              CDTParser]: Found 1 translation units.
[2022-03-18 22:43:56,158 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c
[2022-03-18 22:43:56,167 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db/FLAG098866ea1
[2022-03-18 22:43:56,182 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bb614d6/63296e204edf44618197c2bac52507db
[2022-03-18 22:43:56,184 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-03-18 22:43:56,185 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-03-18 22:43:56,187 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-03-18 22:43:56,187 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-03-18 22:43:56,194 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-03-18 22:43:56,194 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,196 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c1af8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56, skipping insertion in model container
[2022-03-18 22:43:56,196 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,201 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-03-18 22:43:56,229 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-03-18 22:43:56,352 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/egcd3-ll.c[490,503]
[2022-03-18 22:43:56,381 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-03-18 22:43:56,387 INFO  L203         MainTranslator]: Completed pre-run
[2022-03-18 22:43:56,395 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/egcd3-ll.c[490,503]
[2022-03-18 22:43:56,402 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-03-18 22:43:56,413 INFO  L208         MainTranslator]: Completed translation
[2022-03-18 22:43:56,413 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56 WrapperNode
[2022-03-18 22:43:56,413 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-03-18 22:43:56,414 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-03-18 22:43:56,414 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-03-18 22:43:56,414 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-03-18 22:43:56,423 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,424 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,429 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,429 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,433 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,437 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,438 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,439 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-03-18 22:43:56,440 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-03-18 22:43:56,440 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-03-18 22:43:56,440 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-03-18 22:43:56,441 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,447 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-03-18 22:43:56,460 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:56,472 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)
[2022-03-18 22:43:56,474 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
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-03-18 22:43:56,499 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2022-03-18 22:43:56,500 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-03-18 22:43:56,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-03-18 22:43:56,501 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-03-18 22:43:56,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-03-18 22:43:56,501 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-03-18 22:43:56,501 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-03-18 22:43:56,551 INFO  L234             CfgBuilder]: Building ICFG
[2022-03-18 22:43:56,552 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-03-18 22:43:56,658 INFO  L275             CfgBuilder]: Performing block encoding
[2022-03-18 22:43:56,664 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-03-18 22:43:56,665 INFO  L299             CfgBuilder]: Removed 3 assume(true) statements.
[2022-03-18 22:43:56,666 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56 BoogieIcfgContainer
[2022-03-18 22:43:56,666 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-03-18 22:43:56,666 INFO  L113        PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-03-18 22:43:56,667 INFO  L271        PluginConnector]: Initializing IcfgTransformer...
[2022-03-18 22:43:56,667 INFO  L275        PluginConnector]: IcfgTransformer initialized
[2022-03-18 22:43:56,670 INFO  L185        PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56" (1/1) ...
[2022-03-18 22:43:56,692 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:43:56 BasicIcfg
[2022-03-18 22:43:56,692 INFO  L132        PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-03-18 22:43:56,696 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-03-18 22:43:56,696 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-03-18 22:43:56,698 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-03-18 22:43:56,698 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:43:56" (1/4) ...
[2022-03-18 22:43:56,699 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:43:56, skipping insertion in model container
[2022-03-18 22:43:56,699 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:43:56" (2/4) ...
[2022-03-18 22:43:56,699 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:43:56, skipping insertion in model container
[2022-03-18 22:43:56,699 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:43:56" (3/4) ...
[2022-03-18 22:43:56,700 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70118d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:43:56, skipping insertion in model container
[2022-03-18 22:43:56,700 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:43:56" (4/4) ...
[2022-03-18 22:43:56,700 INFO  L111   eAbstractionObserver]: Analyzing ICFG egcd3-ll.cqvasr
[2022-03-18 22:43:56,704 INFO  L205   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-03-18 22:43:56,705 INFO  L164   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-03-18 22:43:56,740 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-03-18 22:43:56,746 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
[2022-03-18 22:43:56,746 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-03-18 22:43:56,758 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-03-18 22:43:56,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-03-18 22:43:56,763 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:56,764 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:56,764 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:56,768 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:56,768 INFO  L85        PathProgramCache]: Analyzing trace with hash -1332561126, now seen corresponding path program 1 times
[2022-03-18 22:43:56,774 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:56,774 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232025844]
[2022-03-18 22:43:56,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:56,775 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:56,840 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:56,883 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-03-18 22:43:56,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:56,893 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2022-03-18 22:43:56,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:56,900 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2022-03-18 22:43:56,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:56,907 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-03-18 22:43:56,907 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:56,908 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232025844]
[2022-03-18 22:43:56,908 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232025844] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 22:43:56,908 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 22:43:56,909 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-03-18 22:43:56,910 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483024248]
[2022-03-18 22:43:56,910 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:43:56,914 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-03-18 22:43:56,914 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:56,935 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-03-18 22:43:56,935 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 22:43:56,937 INFO  L87              Difference]: Start difference. First operand  has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 22:43:57,012 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:43:57,013 INFO  L93              Difference]: Finished difference Result 67 states and 103 transitions.
[2022-03-18 22:43:57,014 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-03-18 22:43:57,015 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22
[2022-03-18 22:43:57,015 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:43:57,021 INFO  L225             Difference]: With dead ends: 67
[2022-03-18 22:43:57,021 INFO  L226             Difference]: Without dead ends: 32
[2022-03-18 22:43:57,023 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-03-18 22:43:57,026 INFO  L912         BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 22:43:57,043 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 22:43:57,064 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-03-18 22:43:57,079 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-03-18 22:43:57,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-03-18 22:43:57,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2022-03-18 22:43:57,083 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22
[2022-03-18 22:43:57,083 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:43:57,083 INFO  L478      AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2022-03-18 22:43:57,083 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 22:43:57,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2022-03-18 22:43:57,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-03-18 22:43:57,085 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:57,085 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:57,085 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-03-18 22:43:57,085 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:57,086 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:57,086 INFO  L85        PathProgramCache]: Analyzing trace with hash -1285593101, now seen corresponding path program 1 times
[2022-03-18 22:43:57,086 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:57,087 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818095070]
[2022-03-18 22:43:57,087 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:57,087 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:57,104 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:43:57,104 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176589052]
[2022-03-18 22:43:57,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:57,105 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:43:57,105 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:57,107 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)
[2022-03-18 22:43:57,108 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-03-18 22:43:57,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:57,159 INFO  L263         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 22:43:57,164 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:43:57,261 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:57,261 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 22:43:57,261 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:57,262 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818095070]
[2022-03-18 22:43:57,262 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:43:57,262 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176589052]
[2022-03-18 22:43:57,262 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [176589052] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 22:43:57,262 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 22:43:57,263 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-03-18 22:43:57,263 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468755137]
[2022-03-18 22:43:57,264 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:43:57,264 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-03-18 22:43:57,264 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:57,265 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-03-18 22:43:57,265 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-03-18 22:43:57,265 INFO  L87              Difference]: Start difference. First operand 32 states and 39 transitions. Second operand  has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2022-03-18 22:43:57,329 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:43:57,329 INFO  L93              Difference]: Finished difference Result 51 states and 64 transitions.
[2022-03-18 22:43:57,330 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-03-18 22:43:57,330 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23
[2022-03-18 22:43:57,330 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:43:57,331 INFO  L225             Difference]: With dead ends: 51
[2022-03-18 22:43:57,331 INFO  L226             Difference]: Without dead ends: 44
[2022-03-18 22:43:57,332 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-03-18 22:43:57,333 INFO  L912         BasicCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 22:43:57,334 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 145 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 22:43:57,334 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2022-03-18 22:43:57,343 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34.
[2022-03-18 22:43:57,343 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-03-18 22:43:57,344 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions.
[2022-03-18 22:43:57,344 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23
[2022-03-18 22:43:57,345 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:43:57,345 INFO  L478      AbstractCegarLoop]: Abstraction has 34 states and 41 transitions.
[2022-03-18 22:43:57,345 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2022-03-18 22:43:57,345 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions.
[2022-03-18 22:43:57,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2022-03-18 22:43:57,346 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:57,346 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:57,372 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-03-18 22:43:57,569 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
[2022-03-18 22:43:57,570 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:57,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:57,570 INFO  L85        PathProgramCache]: Analyzing trace with hash -1248058574, now seen corresponding path program 1 times
[2022-03-18 22:43:57,570 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:57,571 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341983083]
[2022-03-18 22:43:57,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:57,571 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:57,595 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:43:57,596 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467052021]
[2022-03-18 22:43:57,596 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:57,596 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:43:57,596 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:57,602 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)
[2022-03-18 22:43:57,604 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-03-18 22:43:57,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:57,653 INFO  L263         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-03-18 22:43:57,655 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:43:57,867 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:57,868 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 22:43:57,868 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:57,868 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341983083]
[2022-03-18 22:43:57,869 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:43:57,871 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467052021]
[2022-03-18 22:43:57,871 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [467052021] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 22:43:57,871 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 22:43:57,871 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2022-03-18 22:43:57,872 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908877426]
[2022-03-18 22:43:57,872 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:43:57,873 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-03-18 22:43:57,873 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:57,903 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-03-18 22:43:57,913 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2022-03-18 22:43:57,914 INFO  L87              Difference]: Start difference. First operand 34 states and 41 transitions. Second operand  has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2022-03-18 22:43:58,014 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:43:58,015 INFO  L93              Difference]: Finished difference Result 50 states and 62 transitions.
[2022-03-18 22:43:58,015 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-03-18 22:43:58,015 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26
[2022-03-18 22:43:58,016 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:43:58,019 INFO  L225             Difference]: With dead ends: 50
[2022-03-18 22:43:58,020 INFO  L226             Difference]: Without dead ends: 48
[2022-03-18 22:43:58,021 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-03-18 22:43:58,023 INFO  L912         BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 22:43:58,025 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 200 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 22:43:58,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2022-03-18 22:43:58,043 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47.
[2022-03-18 22:43:58,044 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-03-18 22:43:58,049 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions.
[2022-03-18 22:43:58,049 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 26
[2022-03-18 22:43:58,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:43:58,050 INFO  L478      AbstractCegarLoop]: Abstraction has 47 states and 59 transitions.
[2022-03-18 22:43:58,050 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2022-03-18 22:43:58,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions.
[2022-03-18 22:43:58,052 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-03-18 22:43:58,052 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:58,053 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:58,081 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-03-18 22:43:58,275 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
[2022-03-18 22:43:58,276 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:58,276 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:58,277 INFO  L85        PathProgramCache]: Analyzing trace with hash -2002833725, now seen corresponding path program 1 times
[2022-03-18 22:43:58,277 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:58,277 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190163641]
[2022-03-18 22:43:58,277 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:58,277 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:58,293 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:43:58,293 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187831836]
[2022-03-18 22:43:58,293 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:58,293 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:43:58,293 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:58,296 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)
[2022-03-18 22:43:58,297 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-03-18 22:43:58,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:58,337 INFO  L263         TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-03-18 22:43:58,338 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:43:58,421 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:58,422 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 22:43:58,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:58,519 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:58,519 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190163641]
[2022-03-18 22:43:58,519 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:43:58,519 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187831836]
[2022-03-18 22:43:58,519 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [187831836] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 22:43:58,519 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 22:43:58,519 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2022-03-18 22:43:58,520 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123713634]
[2022-03-18 22:43:58,520 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-03-18 22:43:58,520 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-03-18 22:43:58,520 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:58,521 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-03-18 22:43:58,521 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2022-03-18 22:43:58,521 INFO  L87              Difference]: Start difference. First operand 47 states and 59 transitions. Second operand  has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 22:43:58,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:43:58,666 INFO  L93              Difference]: Finished difference Result 100 states and 138 transitions.
[2022-03-18 22:43:58,666 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-03-18 22:43:58,666 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28
[2022-03-18 22:43:58,667 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:43:58,668 INFO  L225             Difference]: With dead ends: 100
[2022-03-18 22:43:58,668 INFO  L226             Difference]: Without dead ends: 93
[2022-03-18 22:43:58,668 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182
[2022-03-18 22:43:58,669 INFO  L912         BasicCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 22:43:58,669 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 278 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 22:43:58,670 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2022-03-18 22:43:58,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68.
[2022-03-18 22:43:58,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15)
[2022-03-18 22:43:58,684 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions.
[2022-03-18 22:43:58,684 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28
[2022-03-18 22:43:58,685 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:43:58,685 INFO  L478      AbstractCegarLoop]: Abstraction has 68 states and 90 transitions.
[2022-03-18 22:43:58,685 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-03-18 22:43:58,685 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions.
[2022-03-18 22:43:58,686 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-03-18 22:43:58,686 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:58,686 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:58,711 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-03-18 22:43:58,907 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
[2022-03-18 22:43:58,908 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:58,908 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:58,908 INFO  L85        PathProgramCache]: Analyzing trace with hash -1141865733, now seen corresponding path program 1 times
[2022-03-18 22:43:58,908 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:58,909 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219353907]
[2022-03-18 22:43:58,909 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:58,909 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:58,926 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:43:58,926 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90519190]
[2022-03-18 22:43:58,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:58,926 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:43:58,926 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:58,929 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)
[2022-03-18 22:43:58,936 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-03-18 22:43:58,977 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:58,978 INFO  L263         TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core
[2022-03-18 22:43:58,983 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:43:59,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:59,126 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 22:43:59,220 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-03-18 22:43:59,221 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:59,221 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219353907]
[2022-03-18 22:43:59,221 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:43:59,221 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90519190]
[2022-03-18 22:43:59,221 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [90519190] provided 1 perfect and 1 imperfect interpolant sequences
[2022-03-18 22:43:59,221 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-03-18 22:43:59,222 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2022-03-18 22:43:59,222 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174229302]
[2022-03-18 22:43:59,222 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:43:59,223 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 22:43:59,223 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:59,223 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 22:43:59,223 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2022-03-18 22:43:59,224 INFO  L87              Difference]: Start difference. First operand 68 states and 90 transitions. Second operand  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-03-18 22:43:59,268 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:43:59,268 INFO  L93              Difference]: Finished difference Result 76 states and 97 transitions.
[2022-03-18 22:43:59,268 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-03-18 22:43:59,269 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31
[2022-03-18 22:43:59,269 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:43:59,271 INFO  L225             Difference]: With dead ends: 76
[2022-03-18 22:43:59,271 INFO  L226             Difference]: Without dead ends: 74
[2022-03-18 22:43:59,271 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2022-03-18 22:43:59,273 INFO  L912         BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 22:43:59,273 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 22:43:59,274 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2022-03-18 22:43:59,298 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72.
[2022-03-18 22:43:59,300 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15)
[2022-03-18 22:43:59,302 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions.
[2022-03-18 22:43:59,302 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 31
[2022-03-18 22:43:59,303 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:43:59,303 INFO  L478      AbstractCegarLoop]: Abstraction has 72 states and 93 transitions.
[2022-03-18 22:43:59,303 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-03-18 22:43:59,303 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions.
[2022-03-18 22:43:59,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2022-03-18 22:43:59,306 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:43:59,307 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:43:59,332 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-03-18 22:43:59,523 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
[2022-03-18 22:43:59,523 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:43:59,524 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:43:59,524 INFO  L85        PathProgramCache]: Analyzing trace with hash -1101190558, now seen corresponding path program 1 times
[2022-03-18 22:43:59,524 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:43:59,524 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420847004]
[2022-03-18 22:43:59,524 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:59,525 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:43:59,534 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:43:59,534 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040601841]
[2022-03-18 22:43:59,534 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:43:59,535 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:43:59,535 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:43:59,536 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)
[2022-03-18 22:43:59,555 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-03-18 22:43:59,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:43:59,578 INFO  L263         TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core
[2022-03-18 22:43:59,582 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:43:59,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:43:59,755 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 22:43:59,850 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-03-18 22:43:59,850 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:43:59,851 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420847004]
[2022-03-18 22:43:59,851 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:43:59,851 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040601841]
[2022-03-18 22:43:59,851 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040601841] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 22:43:59,851 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 22:43:59,851 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11
[2022-03-18 22:43:59,851 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058263817]
[2022-03-18 22:43:59,851 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-03-18 22:43:59,852 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-03-18 22:43:59,852 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:43:59,852 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-03-18 22:43:59,852 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2022-03-18 22:43:59,853 INFO  L87              Difference]: Start difference. First operand 72 states and 93 transitions. Second operand  has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 22:44:00,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:44:00,010 INFO  L93              Difference]: Finished difference Result 108 states and 142 transitions.
[2022-03-18 22:44:00,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-03-18 22:44:00,011 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31
[2022-03-18 22:44:00,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:44:00,014 INFO  L225             Difference]: With dead ends: 108
[2022-03-18 22:44:00,014 INFO  L226             Difference]: Without dead ends: 106
[2022-03-18 22:44:00,015 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182
[2022-03-18 22:44:00,016 INFO  L912         BasicCegarLoop]: 46 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-03-18 22:44:00,017 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 346 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-03-18 22:44:00,017 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2022-03-18 22:44:00,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102.
[2022-03-18 22:44:00,033 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23)
[2022-03-18 22:44:00,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions.
[2022-03-18 22:44:00,034 INFO  L78                 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31
[2022-03-18 22:44:00,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:44:00,035 INFO  L478      AbstractCegarLoop]: Abstraction has 102 states and 136 transitions.
[2022-03-18 22:44:00,035 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 22:44:00,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions.
[2022-03-18 22:44:00,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-03-18 22:44:00,036 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:44:00,036 INFO  L500         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:44:00,062 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-03-18 22:44:00,259 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
[2022-03-18 22:44:00,260 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:44:00,260 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:44:00,260 INFO  L85        PathProgramCache]: Analyzing trace with hash -41147214, now seen corresponding path program 1 times
[2022-03-18 22:44:00,261 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:44:00,261 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777722868]
[2022-03-18 22:44:00,261 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:00,261 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:44:00,270 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:44:00,271 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419065161]
[2022-03-18 22:44:00,271 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:00,279 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:44:00,279 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:44:00,280 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)
[2022-03-18 22:44:00,281 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-03-18 22:44:00,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:44:00,322 INFO  L263         TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 22:44:00,324 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:44:00,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-03-18 22:44:00,410 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 22:44:00,410 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:44:00,410 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777722868]
[2022-03-18 22:44:00,410 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:44:00,410 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419065161]
[2022-03-18 22:44:00,410 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [419065161] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 22:44:00,410 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 22:44:00,410 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 22:44:00,411 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181640078]
[2022-03-18 22:44:00,411 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:44:00,411 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 22:44:00,411 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:44:00,412 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 22:44:00,412 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 22:44:00,412 INFO  L87              Difference]: Start difference. First operand 102 states and 136 transitions. Second operand  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 22:44:00,482 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:44:00,483 INFO  L93              Difference]: Finished difference Result 148 states and 208 transitions.
[2022-03-18 22:44:00,487 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-03-18 22:44:00,487 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36
[2022-03-18 22:44:00,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:44:00,490 INFO  L225             Difference]: With dead ends: 148
[2022-03-18 22:44:00,490 INFO  L226             Difference]: Without dead ends: 146
[2022-03-18 22:44:00,490 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-03-18 22:44:00,491 INFO  L912         BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 22:44:00,491 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 131 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 22:44:00,493 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2022-03-18 22:44:00,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140.
[2022-03-18 22:44:00,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 140 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43)
[2022-03-18 22:44:00,514 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 200 transitions.
[2022-03-18 22:44:00,514 INFO  L78                 Accepts]: Start accepts. Automaton has 140 states and 200 transitions. Word has length 36
[2022-03-18 22:44:00,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:44:00,514 INFO  L478      AbstractCegarLoop]: Abstraction has 140 states and 200 transitions.
[2022-03-18 22:44:00,514 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-03-18 22:44:00,515 INFO  L276                IsEmpty]: Start isEmpty. Operand 140 states and 200 transitions.
[2022-03-18 22:44:00,515 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-03-18 22:44:00,515 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:44:00,515 INFO  L500         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:44:00,535 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-03-18 22:44:00,727 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
[2022-03-18 22:44:00,728 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:44:00,728 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:44:00,728 INFO  L85        PathProgramCache]: Analyzing trace with hash 1201961419, now seen corresponding path program 1 times
[2022-03-18 22:44:00,728 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:44:00,728 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043606388]
[2022-03-18 22:44:00,728 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:00,728 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:44:00,742 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:44:00,742 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882936919]
[2022-03-18 22:44:00,742 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:00,742 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:44:00,742 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:44:00,746 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)
[2022-03-18 22:44:00,747 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-03-18 22:44:00,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:44:00,787 INFO  L263         TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core
[2022-03-18 22:44:00,789 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:44:01,040 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2022-03-18 22:44:01,040 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 22:44:01,160 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-03-18 22:44:01,160 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:44:01,161 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043606388]
[2022-03-18 22:44:01,161 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:44:01,161 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882936919]
[2022-03-18 22:44:01,161 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882936919] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 22:44:01,161 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 22:44:01,161 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13
[2022-03-18 22:44:01,161 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373314721]
[2022-03-18 22:44:01,161 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-03-18 22:44:01,162 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-03-18 22:44:01,162 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:44:01,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-03-18 22:44:01,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156
[2022-03-18 22:44:01,163 INFO  L87              Difference]: Start difference. First operand 140 states and 200 transitions. Second operand  has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2022-03-18 22:44:02,474 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:44:02,475 INFO  L93              Difference]: Finished difference Result 268 states and 390 transitions.
[2022-03-18 22:44:02,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2022-03-18 22:44:02,476 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36
[2022-03-18 22:44:02,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:44:02,477 INFO  L225             Difference]: With dead ends: 268
[2022-03-18 22:44:02,477 INFO  L226             Difference]: Without dead ends: 266
[2022-03-18 22:44:02,478 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552
[2022-03-18 22:44:02,479 INFO  L912         BasicCegarLoop]: 52 mSDtfsCounter, 142 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2022-03-18 22:44:02,479 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 399 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2022-03-18 22:44:02,479 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 266 states.
[2022-03-18 22:44:02,510 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 253.
[2022-03-18 22:44:02,511 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 253 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 159 states have internal predecessors, (207), 85 states have call successors, (85), 10 states have call predecessors, (85), 9 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83)
[2022-03-18 22:44:02,513 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions.
[2022-03-18 22:44:02,513 INFO  L78                 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 36
[2022-03-18 22:44:02,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:44:02,513 INFO  L478      AbstractCegarLoop]: Abstraction has 253 states and 375 transitions.
[2022-03-18 22:44:02,513 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2022-03-18 22:44:02,513 INFO  L276                IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions.
[2022-03-18 22:44:02,514 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-03-18 22:44:02,514 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:44:02,514 INFO  L500         BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:44:02,537 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-03-18 22:44:02,737 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
[2022-03-18 22:44:02,737 INFO  L403      AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:44:02,738 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:44:02,738 INFO  L85        PathProgramCache]: Analyzing trace with hash 2036500795, now seen corresponding path program 1 times
[2022-03-18 22:44:02,738 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:44:02,738 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526301907]
[2022-03-18 22:44:02,738 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:02,738 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:44:02,748 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:44:02,748 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132717509]
[2022-03-18 22:44:02,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:02,748 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:44:02,749 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:44:02,750 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)
[2022-03-18 22:44:02,763 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-03-18 22:44:02,799 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:44:02,799 INFO  L263         TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-03-18 22:44:02,801 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:44:02,875 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-03-18 22:44:02,875 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-03-18 22:44:02,875 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:44:02,875 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526301907]
[2022-03-18 22:44:02,876 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:44:02,876 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132717509]
[2022-03-18 22:44:02,876 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132717509] provided 1 perfect and 0 imperfect interpolant sequences
[2022-03-18 22:44:02,876 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-03-18 22:44:02,876 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-03-18 22:44:02,876 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437987508]
[2022-03-18 22:44:02,876 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-03-18 22:44:02,877 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-03-18 22:44:02,877 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:44:02,877 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-03-18 22:44:02,877 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-03-18 22:44:02,877 INFO  L87              Difference]: Start difference. First operand 253 states and 375 transitions. Second operand  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-03-18 22:44:02,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:44:02,977 INFO  L93              Difference]: Finished difference Result 414 states and 645 transitions.
[2022-03-18 22:44:02,977 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-03-18 22:44:02,977 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41
[2022-03-18 22:44:02,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:44:02,982 INFO  L225             Difference]: With dead ends: 414
[2022-03-18 22:44:02,983 INFO  L226             Difference]: Without dead ends: 412
[2022-03-18 22:44:02,984 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-03-18 22:44:02,986 INFO  L912         BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-03-18 22:44:02,986 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-03-18 22:44:02,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 412 states.
[2022-03-18 22:44:03,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 357.
[2022-03-18 22:44:03,047 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 357 states, 181 states have (on average 1.270718232044199) internal successors, (230), 202 states have internal predecessors, (230), 165 states have call successors, (165), 11 states have call predecessors, (165), 10 states have return successors, (163), 143 states have call predecessors, (163), 163 states have call successors, (163)
[2022-03-18 22:44:03,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 558 transitions.
[2022-03-18 22:44:03,051 INFO  L78                 Accepts]: Start accepts. Automaton has 357 states and 558 transitions. Word has length 41
[2022-03-18 22:44:03,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:44:03,052 INFO  L478      AbstractCegarLoop]: Abstraction has 357 states and 558 transitions.
[2022-03-18 22:44:03,052 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2022-03-18 22:44:03,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 357 states and 558 transitions.
[2022-03-18 22:44:03,056 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2022-03-18 22:44:03,056 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:44:03,057 INFO  L500         BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:44:03,083 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-03-18 22:44:03,274 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2022-03-18 22:44:03,275 INFO  L403      AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:44:03,275 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:44:03,275 INFO  L85        PathProgramCache]: Analyzing trace with hash -379845647, now seen corresponding path program 1 times
[2022-03-18 22:44:03,275 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:44:03,275 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66034489]
[2022-03-18 22:44:03,275 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:03,276 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:44:03,284 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:44:03,284 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771858513]
[2022-03-18 22:44:03,284 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:03,285 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:44:03,285 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:44:03,286 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 22:44:03,304 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-03-18 22:44:03,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:44:03,334 INFO  L263         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core
[2022-03-18 22:44:03,336 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:44:03,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2022-03-18 22:44:03,967 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-03-18 22:44:04,633 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2022-03-18 22:44:04,633 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-03-18 22:44:04,633 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66034489]
[2022-03-18 22:44:04,633 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-03-18 22:44:04,633 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771858513]
[2022-03-18 22:44:04,633 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771858513] provided 0 perfect and 2 imperfect interpolant sequences
[2022-03-18 22:44:04,633 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-03-18 22:44:04,633 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22
[2022-03-18 22:44:04,634 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644352128]
[2022-03-18 22:44:04,634 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-03-18 22:44:04,634 INFO  L554      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2022-03-18 22:44:04,634 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-03-18 22:44:04,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2022-03-18 22:44:04,635 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462
[2022-03-18 22:44:04,635 INFO  L87              Difference]: Start difference. First operand 357 states and 558 transitions. Second operand  has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11)
[2022-03-18 22:44:10,534 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-03-18 22:44:10,535 INFO  L93              Difference]: Finished difference Result 713 states and 1105 transitions.
[2022-03-18 22:44:10,535 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2022-03-18 22:44:10,535 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53
[2022-03-18 22:44:10,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-03-18 22:44:10,540 INFO  L225             Difference]: With dead ends: 713
[2022-03-18 22:44:10,540 INFO  L226             Difference]: Without dead ends: 546
[2022-03-18 22:44:10,543 INFO  L911         BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256
[2022-03-18 22:44:10,543 INFO  L912         BasicCegarLoop]: 32 mSDtfsCounter, 129 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2022-03-18 22:44:10,544 INFO  L913         BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 450 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time]
[2022-03-18 22:44:10,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 546 states.
[2022-03-18 22:44:10,644 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 465.
[2022-03-18 22:44:10,645 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 465 states, 261 states have (on average 1.260536398467433) internal successors, (329), 280 states have internal predecessors, (329), 189 states have call successors, (189), 15 states have call predecessors, (189), 14 states have return successors, (187), 169 states have call predecessors, (187), 187 states have call successors, (187)
[2022-03-18 22:44:10,648 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 705 transitions.
[2022-03-18 22:44:10,648 INFO  L78                 Accepts]: Start accepts. Automaton has 465 states and 705 transitions. Word has length 53
[2022-03-18 22:44:10,648 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-03-18 22:44:10,648 INFO  L478      AbstractCegarLoop]: Abstraction has 465 states and 705 transitions.
[2022-03-18 22:44:10,648 INFO  L479      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11)
[2022-03-18 22:44:10,649 INFO  L276                IsEmpty]: Start isEmpty. Operand 465 states and 705 transitions.
[2022-03-18 22:44:10,650 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2022-03-18 22:44:10,650 INFO  L492         BasicCegarLoop]: Found error trace
[2022-03-18 22:44:10,650 INFO  L500         BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-03-18 22:44:10,671 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-03-18 22:44:10,863 WARN  L460      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-03-18 22:44:10,863 INFO  L403      AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-03-18 22:44:10,864 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-03-18 22:44:10,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 1179170910, now seen corresponding path program 1 times
[2022-03-18 22:44:10,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-03-18 22:44:10,864 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520190484]
[2022-03-18 22:44:10,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:10,864 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-03-18 22:44:10,872 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-03-18 22:44:10,873 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187454561]
[2022-03-18 22:44:10,873 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-03-18 22:44:10,873 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-03-18 22:44:10,873 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-03-18 22:44:10,876 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-03-18 22:44:10,877 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-03-18 22:44:10,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-03-18 22:44:10,915 INFO  L263         TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core
[2022-03-18 22:44:10,917 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-03-18 22:44:11,276 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked.
[2022-03-18 22:44:11,276 INFO  L328         TraceCheckSpWp]: Computing backward predicates...