/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-34549b5
[2022-04-06 11:58:56,403 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-04-06 11:58:56,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-06 11:58:56,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-06 11:58:56,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-06 11:58:56,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-06 11:58:56,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-06 11:58:56,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-06 11:58:56,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-06 11:58:56,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-04-06 11:58:56,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-04-06 11:58:56,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-06 11:58:56,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-06 11:58:56,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-06 11:58:56,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-06 11:58:56,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-06 11:58:56,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-06 11:58:56,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-06 11:58:56,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-06 11:58:56,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-06 11:58:56,471 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-06 11:58:56,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-06 11:58:56,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-06 11:58:56,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-04-06 11:58:56,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-06 11:58:56,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-06 11:58:56,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-06 11:58:56,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-06 11:58:56,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-06 11:58:56,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-06 11:58:56,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-06 11:58:56,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-06 11:58:56,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-06 11:58:56,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-06 11:58:56,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-06 11:58:56,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-06 11:58:56,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-04-06 11:58:56,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-04-06 11:58:56,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-04-06 11:58:56,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-04-06 11:58:56,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-04-06 11:58:56,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-04-06 11:58:56,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf
[2022-04-06 11:58:56,499 INFO L113 SettingsManager]: Loading preferences was successful
[2022-04-06 11:58:56,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-06 11:58:56,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-04-06 11:58:56,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-04-06 11:58:56,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-04-06 11:58:56,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * Use SBE=true
[2022-04-06 11:58:56,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-06 11:58:56,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-04-06 11:58:56,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 11:58:56,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-04-06 11:58:56,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-04-06 11:58:56,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-04-06 11:58:56,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-04-06 11:58:56,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-04-06 11:58:56,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2022-04-06 11:58:56,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2022-04-06 11:58:56,504 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-04-06 11:58:56,504 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-06 11:58:56,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-06 11:58:56,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-06 11:58:56,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-06 11:58:56,702 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-04-06 11:58:56,703 INFO L275 PluginConnector]: CDTParser initialized
[2022-04-06 11:58:56,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c
[2022-04-06 11:58:56,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1677d29/45d489d073ad4d7eb0d56c85a30a2d1e/FLAG00ac082ee
[2022-04-06 11:58:57,138 INFO L306 CDTParser]: Found 1 translation units.
[2022-04-06 11:58:57,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c
[2022-04-06 11:58:57,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1677d29/45d489d073ad4d7eb0d56c85a30a2d1e/FLAG00ac082ee
[2022-04-06 11:58:57,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1677d29/45d489d073ad4d7eb0d56c85a30a2d1e
[2022-04-06 11:58:57,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-06 11:58:57,152 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements.
[2022-04-06 11:58:57,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-06 11:58:57,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-06 11:58:57,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-06 11:58:57,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd84f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57, skipping insertion in model container
[2022-04-06 11:58:57,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-04-06 11:58:57,181 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-04-06 11:58:57,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537]
[2022-04-06 11:58:57,299 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-06 11:58:57,303 INFO L203 MainTranslator]: Completed pre-run
[2022-04-06 11:58:57,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537]
[2022-04-06 11:58:57,314 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-06 11:58:57,321 INFO L208 MainTranslator]: Completed translation
[2022-04-06 11:58:57,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57 WrapperNode
[2022-04-06 11:58:57,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-06 11:58:57,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-06 11:58:57,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-06 11:58:57,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-04-06 11:58:57,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-06 11:58:57,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-06 11:58:57,338 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-04-06 11:58:57,338 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-04-06 11:58:57,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-06 11:58:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:58:57,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-04-06 11:58:57,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-06 11:58:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-06 11:58:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-04-06 11:58:57,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-06 11:58:57,430 INFO L234 CfgBuilder]: Building ICFG
[2022-04-06 11:58:57,431 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-06 11:58:57,513 INFO L275 CfgBuilder]: Performing block encoding
[2022-04-06 11:58:57,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-06 11:58:57,516 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2022-04-06 11:58:57,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:58:57 BoogieIcfgContainer
[2022-04-06 11:58:57,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-06 11:58:57,518 INFO L113 PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-04-06 11:58:57,518 INFO L271 PluginConnector]: Initializing IcfgTransformer...
[2022-04-06 11:58:57,519 INFO L275 PluginConnector]: IcfgTransformer initialized
[2022-04-06 11:58:57,521 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:58:57" (1/1) ...
[2022-04-06 11:58:57,522 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR
[2022-04-06 11:58:57,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:58:57 BasicIcfg
[2022-04-06 11:58:57,538 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-04-06 11:58:57,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-06 11:58:57,539 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-04-06 11:58:57,540 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-04-06 11:58:57,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:58:57" (1/4) ...
[2022-04-06 11:58:57,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a880321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:58:57, skipping insertion in model container
[2022-04-06 11:58:57,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:58:57" (2/4) ...
[2022-04-06 11:58:57,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a880321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:58:57, skipping insertion in model container
[2022-04-06 11:58:57,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:58:57" (3/4) ...
[2022-04-06 11:58:57,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a880321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:58:57, skipping insertion in model container
[2022-04-06 11:58:57,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:58:57" (4/4) ...
[2022-04-06 11:58:57,542 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.cqvasr
[2022-04-06 11:58:57,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-04-06 11:58:57,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-06 11:58:57,596 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-06 11:58:57,600 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP
[2022-04-06 11:58:57,601 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-06 11:58:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-06 11:58:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-04-06 11:58:57,613 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 11:58:57,613 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 11:58:57,613 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 11:58:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 11:58:57,617 INFO L85 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times
[2022-04-06 11:58:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 11:58:57,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757001068]
[2022-04-06 11:58:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 11:58:57,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 11:58:57,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542541017]
[2022-04-06 11:58:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:57,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:58:57,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:58:57,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 11:58:57,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-06 11:58:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 11:58:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-04-06 11:58:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 11:58:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-04-06 11:58:57,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 11:58:57,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 11:58:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757001068]
[2022-04-06 11:58:57,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 11:58:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542541017]
[2022-04-06 11:58:57,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542541017] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 11:58:57,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 11:58:57,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-04-06 11:58:57,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516592296]
[2022-04-06 11:58:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 11:58:57,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-04-06 11:58:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 11:58:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-04-06 11:58:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-04-06 11:58:57,836 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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)
[2022-04-06 11:58:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 11:58:57,848 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions.
[2022-04-06 11:58:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2022-04-06 11:58:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 22
[2022-04-06 11:58:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 11:58:57,853 INFO L225 Difference]: With dead ends: 53
[2022-04-06 11:58:57,853 INFO L226 Difference]: Without dead ends: 25
[2022-04-06 11:58:57,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-04-06 11:58:57,857 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 11:58:57,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 11:58:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2022-04-06 11:58:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2022-04-06 11:58:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 11:58:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions.
[2022-04-06 11:58:57,878 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22
[2022-04-06 11:58:57,879 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 11:58:57,879 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions.
[2022-04-06 11:58:57,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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)
[2022-04-06 11:58:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions.
[2022-04-06 11:58:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-04-06 11:58:57,880 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 11:58:57,880 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 11:58:57,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-04-06 11:58:58,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2022-04-06 11:58:58,092 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 11:58:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 11:58:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times
[2022-04-06 11:58:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 11:58:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159904294]
[2022-04-06 11:58:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 11:58:58,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 11:58:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726138320]
[2022-04-06 11:58:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:58,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:58:58,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:58:58,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 11:58:58,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-04-06 11:58:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 11:58:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-04-06 11:58:58,157 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 11:58:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-06 11:58:58,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 11:58:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 11:58:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159904294]
[2022-04-06 11:58:58,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 11:58:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726138320]
[2022-04-06 11:58:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726138320] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 11:58:58,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 11:58:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-04-06 11:58:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057416125]
[2022-04-06 11:58:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 11:58:58,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-04-06 11:58:58,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 11:58:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-04-06 11:58:58,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-04-06 11:58:58,257 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2022-04-06 11:58:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 11:58:58,267 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions.
[2022-04-06 11:58:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-04-06 11:58:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23
[2022-04-06 11:58:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 11:58:58,269 INFO L225 Difference]: With dead ends: 34
[2022-04-06 11:58:58,269 INFO L226 Difference]: Without dead ends: 27
[2022-04-06 11:58:58,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-04-06 11:58:58,271 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-06 11:58:58,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-06 11:58:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2022-04-06 11:58:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2022-04-06 11:58:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 11:58:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions.
[2022-04-06 11:58:58,283 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23
[2022-04-06 11:58:58,284 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 11:58:58,285 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions.
[2022-04-06 11:58:58,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2022-04-06 11:58:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions.
[2022-04-06 11:58:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-04-06 11:58:58,286 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 11:58:58,286 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-06 11:58:58,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-04-06 11:58:58,499 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,SelfDestructingSolverStorable1
[2022-04-06 11:58:58,500 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 11:58:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 11:58:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times
[2022-04-06 11:58:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 11:58:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239631482]
[2022-04-06 11:58:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 11:58:58,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 11:58:58,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139919582]
[2022-04-06 11:58:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:58:58,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:58:58,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:58:58,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 11:58:58,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-04-06 11:58:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 11:58:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-04-06 11:58:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 11:58:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-06 11:58:58,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-06 11:58:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 11:58:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239631482]
[2022-04-06 11:58:58,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 11:58:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139919582]
[2022-04-06 11:58:58,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139919582] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-06 11:58:58,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-06 11:58:58,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-06 11:58:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744200493]
[2022-04-06 11:58:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-06 11:58:58,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-06 11:58:58,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 11:58:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-06 11:58:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-04-06 11:58:58,861 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2022-04-06 11:59:00,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-06 11:59:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 11:59:00,967 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions.
[2022-04-06 11:59:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-04-06 11:59:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23
[2022-04-06 11:59:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 11:59:00,968 INFO L225 Difference]: With dead ends: 39
[2022-04-06 11:59:00,968 INFO L226 Difference]: Without dead ends: 37
[2022-04-06 11:59:00,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-04-06 11:59:00,969 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2022-04-06 11:59:00,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2022-04-06 11:59:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2022-04-06 11:59:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2022-04-06 11:59:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-04-06 11:59:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions.
[2022-04-06 11:59:00,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23
[2022-04-06 11:59:00,975 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 11:59:00,975 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions.
[2022-04-06 11:59:00,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2022-04-06 11:59:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions.
[2022-04-06 11:59:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-04-06 11:59:00,976 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 11:59:00,976 INFO L499 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]
[2022-04-06 11:59:00,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-04-06 11:59:01,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:59:01,191 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 11:59:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 11:59:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times
[2022-04-06 11:59:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 11:59:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254187402]
[2022-04-06 11:59:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:59:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 11:59:01,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 11:59:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300569225]
[2022-04-06 11:59:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:59:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:59:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:59:01,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 11:59:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-04-06 11:59:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-06 11:59:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-04-06 11:59:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-06 11:59:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-06 11:59:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-06 11:59:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-06 11:59:01,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-06 11:59:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254187402]
[2022-04-06 11:59:01,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-06 11:59:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300569225]
[2022-04-06 11:59:01,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300569225] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-06 11:59:01,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-06 11:59:01,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10
[2022-04-06 11:59:01,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575570199]
[2022-04-06 11:59:01,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-06 11:59:01,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-04-06 11:59:01,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-06 11:59:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-04-06 11:59:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2022-04-06 11:59:01,511 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5)
[2022-04-06 11:59:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-06 11:59:01,645 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions.
[2022-04-06 11:59:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-04-06 11:59:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29
[2022-04-06 11:59:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-06 11:59:01,646 INFO L225 Difference]: With dead ends: 43
[2022-04-06 11:59:01,646 INFO L226 Difference]: Without dead ends: 38
[2022-04-06 11:59:01,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156
[2022-04-06 11:59:01,647 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-06 11:59:01,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 120 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-06 11:59:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-04-06 11:59:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29.
[2022-04-06 11:59:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2022-04-06 11:59:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions.
[2022-04-06 11:59:01,652 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29
[2022-04-06 11:59:01,652 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-06 11:59:01,652 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions.
[2022-04-06 11:59:01,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5)
[2022-04-06 11:59:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions.
[2022-04-06 11:59:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2022-04-06 11:59:01,653 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-06 11:59:01,653 INFO L499 BasicCegarLoop]: trace histogram [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]
[2022-04-06 11:59:01,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-04-06 11:59:01,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:59:01,868 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-06 11:59:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-06 11:59:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times
[2022-04-06 11:59:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-06 11:59:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788903581]
[2022-04-06 11:59:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:59:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-06 11:59:01,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-06 11:59:01,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743602177]
[2022-04-06 11:59:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-06 11:59:01,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:59:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-06 11:59:01,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-06 11:59:01,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-04-06 11:59:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-04-06 11:59:01,924 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-04-06 11:59:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-04-06 11:59:01,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2022-04-06 11:59:01,952 INFO L618 BasicCegarLoop]: Counterexample is feasible
[2022-04-06 11:59:01,953 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-04-06 11:59:01,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-04-06 11:59:02,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-06 11:59:02,157 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1]
[2022-04-06 11:59:02,159 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2022-04-06 11:59:02,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:59:02 BasicIcfg
[2022-04-06 11:59:02,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-04-06 11:59:02,175 INFO L158 Benchmark]: Toolchain (without parser) took 5022.63ms. Allocated memory was 197.1MB in the beginning and 255.9MB in the end (delta: 58.7MB). Free memory was 144.6MB in the beginning and 175.3MB in the end (delta: -30.7MB). Peak memory consumption was 29.1MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,175 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 197.1MB. Free memory was 161.0MB in the beginning and 160.8MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB.
[2022-04-06 11:59:02,175 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.85ms. Allocated memory is still 197.1MB. Free memory was 144.5MB in the beginning and 173.2MB in the end (delta: -28.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,175 INFO L158 Benchmark]: Boogie Preprocessor took 15.79ms. Allocated memory is still 197.1MB. Free memory was 173.2MB in the beginning and 171.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,176 INFO L158 Benchmark]: RCFGBuilder took 179.36ms. Allocated memory is still 197.1MB. Free memory was 171.7MB in the beginning and 161.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,176 INFO L158 Benchmark]: IcfgTransformer took 19.58ms. Allocated memory is still 197.1MB. Free memory was 161.2MB in the beginning and 159.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,176 INFO L158 Benchmark]: TraceAbstraction took 4635.94ms. Allocated memory was 197.1MB in the beginning and 255.9MB in the end (delta: 58.7MB). Free memory was 159.6MB in the beginning and 175.3MB in the end (delta: -15.7MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB.
[2022-04-06 11:59:02,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.08ms. Allocated memory is still 197.1MB. Free memory was 161.0MB in the beginning and 160.8MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 166.85ms. Allocated memory is still 197.1MB. Free memory was 144.5MB in the beginning and 173.2MB in the end (delta: -28.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 15.79ms. Allocated memory is still 197.1MB. Free memory was 173.2MB in the beginning and 171.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
* RCFGBuilder took 179.36ms. Allocated memory is still 197.1MB. Free memory was 171.7MB in the beginning and 161.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB.
* IcfgTransformer took 19.58ms. Allocated memory is still 197.1MB. Free memory was 161.2MB in the beginning and 159.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* TraceAbstraction took 4635.94ms. Allocated memory was 197.1MB in the beginning and 255.9MB in the end (delta: 58.7MB). Free memory was 159.6MB in the beginning and 175.3MB in the end (delta: -15.7MB). Peak memory consumption was 44.0MB. Max. memory is 8.0GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- CounterExampleResult [Line: 14]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L19] int counter = 0;
VAL [\old(counter)=10, counter=0]
[L21] int A, R;
[L22] long long u, v, r;
[L23] A = __VERIFIER_nondet_int()
[L24] R = __VERIFIER_nondet_int()
[L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
VAL [\old(cond)=1, \old(counter)=0, counter=0]
[L9] COND FALSE !(!cond)
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0]
[L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A)
VAL [\old(counter)=0, A=7, counter=0, R=3]
[L28] CALL assume_abort_if_not(A % 2 == 1)
VAL [\old(cond)=1, \old(counter)=0, counter=0]
[L9] COND FALSE !(!cond)
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0]
[L28] RET assume_abort_if_not(A % 2 == 1)
VAL [\old(counter)=0, A=7, counter=0, R=3]
[L30] u = ((long long) 2 * R) + 1
[L31] v = 1
[L32] r = ((long long) R * R) - A
VAL [\old(counter)=0, A=7, counter=0, R=3, r=2, u=7, v=1]
[L34] EXPR counter++
VAL [\old(counter)=0, A=7, counter=1, counter++=0, r=2, R=3, u=7, v=1]
[L34] COND TRUE counter++<1
[L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=1, \old(counter)=0, counter=1]
[L12] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1]
[L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(counter)=0, A=7, counter=1, r=2, R=3, u=7, v=1]
[L36] COND FALSE !(!(r != 0))
VAL [\old(counter)=0, A=7, counter=1, R=3, r=2, u=7, v=1]
[L38] COND TRUE r > 0
[L39] r = r - v
[L40] v = v + 2
VAL [\old(counter)=0, A=7, counter=1, R=3, r=1, u=7, v=3]
[L34] EXPR counter++
VAL [\old(counter)=0, A=7, counter=2, counter++=1, r=1, R=3, u=7, v=3]
[L34] COND FALSE !(counter++<1)
[L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=0, \old(counter)=0, counter=2]
[L12] COND TRUE !(cond)
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2]
[L14] reach_error()
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 306 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 200 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 104 IncrementalHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 106 mSDtfsCounter, 104 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 357 SizeOfPredicates, 10 NumberOfNonLiveVariables, 379 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 22/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2022-04-06 11:59:02,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...