/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/fermat1-ll_unwindbound5.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-7390193
[2022-04-05 07:50:52,758 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-04-05 07:50:52,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-04-05 07:50:52,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-04-05 07:50:52,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-04-05 07:50:52,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-04-05 07:50:52,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-04-05 07:50:52,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-04-05 07:50:52,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-04-05 07:50:52,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-04-05 07:50:52,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-04-05 07:50:52,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-04-05 07:50:52,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-04-05 07:50:52,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-04-05 07:50:52,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-04-05 07:50:52,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-04-05 07:50:52,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-04-05 07:50:52,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-04-05 07:50:52,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-04-05 07:50:52,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-04-05 07:50:52,838 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values
[2022-04-05 07:50:52,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-04-05 07:50:52,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-04-05 07:50:52,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-04-05 07:50:52,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-04-05 07:50:52,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-04-05 07:50:52,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-04-05 07:50:52,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-04-05 07:50:52,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-04-05 07:50:52,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-04-05 07:50:52,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-04-05 07:50:52,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-04-05 07:50:52,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-04-05 07:50:52,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-04-05 07:50:52,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-04-05 07:50:52,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-04-05 07:50:52,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-04-05 07:50:52,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-04-05 07:50:52,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-04-05 07:50:52,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-04-05 07:50:52,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-04-05 07:50:52,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-04-05 07:50:52,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf
[2022-04-05 07:50:52,884 INFO L113 SettingsManager]: Loading preferences was successful
[2022-04-05 07:50:52,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-04-05 07:50:52,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-04-05 07:50:52,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-04-05 07:50:52,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-04-05 07:50:52,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-04-05 07:50:52,886 INFO L138 SettingsManager]: * Use SBE=true
[2022-04-05 07:50:52,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-04-05 07:50:52,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-04-05 07:50:52,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-04-05 07:50:52,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-04-05 07:50:52,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-04-05 07:50:52,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-04-05 07:50:52,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-04-05 07:50:52,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-05 07:50:52,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-04-05 07:50:52,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2022-04-05 07:50:52,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2022-04-05 07:50:52,891 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-04-05 07:50:52,892 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-04-05 07:50:53,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-04-05 07:50:53,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-04-05 07:50:53,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-04-05 07:50:53,149 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-04-05 07:50:53,149 INFO L275 PluginConnector]: CDTParser initialized
[2022-04-05 07:50:53,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c
[2022-04-05 07:50:53,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b6ed28e/0f913edd3a834958b884de84a6d612da/FLAG1f3703a26
[2022-04-05 07:50:53,626 INFO L306 CDTParser]: Found 1 translation units.
[2022-04-05 07:50:53,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c
[2022-04-05 07:50:53,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b6ed28e/0f913edd3a834958b884de84a6d612da/FLAG1f3703a26
[2022-04-05 07:50:53,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b6ed28e/0f913edd3a834958b884de84a6d612da
[2022-04-05 07:50:53,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-04-05 07:50:53,652 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements.
[2022-04-05 07:50:53,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-04-05 07:50:53,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-04-05 07:50:53,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-04-05 07:50:53,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbac692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53, skipping insertion in model container
[2022-04-05 07:50:53,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-04-05 07:50:53,680 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-04-05 07:50:53,853 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/fermat1-ll_unwindbound5.c[535,548]
[2022-04-05 07:50:53,887 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-05 07:50:53,894 INFO L203 MainTranslator]: Completed pre-run
[2022-04-05 07:50:53,907 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/fermat1-ll_unwindbound5.c[535,548]
[2022-04-05 07:50:53,926 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-04-05 07:50:53,940 INFO L208 MainTranslator]: Completed translation
[2022-04-05 07:50:53,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53 WrapperNode
[2022-04-05 07:50:53,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-04-05 07:50:53,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-04-05 07:50:53,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-04-05 07:50:53,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-04-05 07:50:53,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-04-05 07:50:53,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-04-05 07:50:53,979 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-04-05 07:50:53,979 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-04-05 07:50:53,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (1/1) ...
[2022-04-05 07:50:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-04-05 07:50:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:50:54,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-04-05 07:50:54,027 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
[2022-04-05 07:50:54,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-04-05 07:50:54,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-04-05 07:50:54,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-04-05 07:50:54,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-04-05 07:50:54,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-04-05 07:50:54,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-04-05 07:50:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-04-05 07:50:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-04-05 07:50:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-04-05 07:50:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-04-05 07:50:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-04-05 07:50:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-04-05 07:50:54,114 INFO L234 CfgBuilder]: Building ICFG
[2022-04-05 07:50:54,115 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-04-05 07:50:54,324 INFO L275 CfgBuilder]: Performing block encoding
[2022-04-05 07:50:54,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-04-05 07:50:54,329 INFO L299 CfgBuilder]: Removed 3 assume(true) statements.
[2022-04-05 07:50:54,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:50:54 BoogieIcfgContainer
[2022-04-05 07:50:54,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-04-05 07:50:54,331 INFO L113 PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-04-05 07:50:54,331 INFO L271 PluginConnector]: Initializing IcfgTransformer...
[2022-04-05 07:50:54,332 INFO L275 PluginConnector]: IcfgTransformer initialized
[2022-04-05 07:50:54,334 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:50:54" (1/1) ...
[2022-04-05 07:50:54,336 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR
[2022-04-05 07:50:54,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:50:54 BasicIcfg
[2022-04-05 07:50:54,351 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-04-05 07:50:54,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-04-05 07:50:54,352 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-04-05 07:50:54,355 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-04-05 07:50:54,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:50:53" (1/4) ...
[2022-04-05 07:50:54,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196abe43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:50:54, skipping insertion in model container
[2022-04-05 07:50:54,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:50:53" (2/4) ...
[2022-04-05 07:50:54,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196abe43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:50:54, skipping insertion in model container
[2022-04-05 07:50:54,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:50:54" (3/4) ...
[2022-04-05 07:50:54,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196abe43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:50:54, skipping insertion in model container
[2022-04-05 07:50:54,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:50:54" (4/4) ...
[2022-04-05 07:50:54,357 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.cqvasr
[2022-04-05 07:50:54,361 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-04-05 07:50:54,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-04-05 07:50:54,406 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-04-05 07:50:54,412 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
[2022-04-05 07:50:54,413 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-04-05 07:50:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-04-05 07:50:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-04-05 07:50:54,435 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:50:54,435 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:50:54,435 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:50:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:50:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times
[2022-04-05 07:50:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:50:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117825839]
[2022-04-05 07:50:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:50:54,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:50:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175465813]
[2022-04-05 07:50:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:54,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:50:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:50:54,559 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)
[2022-04-05 07:50:54,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-04-05 07:50:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:50:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-04-05 07:50:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:50:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2022-04-05 07:50:54,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-05 07:50:54,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:50:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117825839]
[2022-04-05 07:50:54,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:50:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175465813]
[2022-04-05 07:50:54,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175465813] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-05 07:50:54,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-05 07:50:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-04-05 07:50:54,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944810780]
[2022-04-05 07:50:54,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:50:54,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-04-05 07:50:54,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:50:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-04-05 07:50:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-04-05 07:50:54,755 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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)
[2022-04-05 07:50:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:50:54,780 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions.
[2022-04-05 07:50:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2022-04-05 07:50:54,782 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
[2022-04-05 07:50:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:50:54,787 INFO L225 Difference]: With dead ends: 67
[2022-04-05 07:50:54,787 INFO L226 Difference]: Without dead ends: 32
[2022-04-05 07:50:54,790 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
[2022-04-05 07:50:54,793 INFO L913 BasicCegarLoop]: 46 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, 46 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
[2022-04-05 07:50:54,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-05 07:50:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2022-04-05 07:50:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2022-04-05 07:50:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-05 07:50:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions.
[2022-04-05 07:50:54,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22
[2022-04-05 07:50:54,821 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:50:54,821 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions.
[2022-04-05 07:50:54,821 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)
[2022-04-05 07:50:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions.
[2022-04-05 07:50:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-04-05 07:50:54,823 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:50:54,823 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]
[2022-04-05 07:50:54,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-04-05 07:50:55,037 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
[2022-04-05 07:50:55,038 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:50:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:50:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times
[2022-04-05 07:50:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:50:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994502719]
[2022-04-05 07:50:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:50:55,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:50:55,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186054685]
[2022-04-05 07:50:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:55,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:50:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:50:55,058 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)
[2022-04-05 07:50:55,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-04-05 07:50:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:50:55,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-04-05 07:50:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:50:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:50:55,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-05 07:50:55,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:50:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994502719]
[2022-04-05 07:50:55,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:50:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186054685]
[2022-04-05 07:50:55,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186054685] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-05 07:50:55,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-05 07:50:55,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-04-05 07:50:55,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418794294]
[2022-04-05 07:50:55,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:50:55,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-04-05 07:50:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:50:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-04-05 07:50:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-04-05 07:50:55,218 INFO L87 Difference]: Start difference. First operand 32 states and 41 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)
[2022-04-05 07:50:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:50:55,243 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions.
[2022-04-05 07:50:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-04-05 07:50:55,244 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
[2022-04-05 07:50:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:50:55,245 INFO L225 Difference]: With dead ends: 41
[2022-04-05 07:50:55,245 INFO L226 Difference]: Without dead ends: 34
[2022-04-05 07:50:55,245 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
[2022-04-05 07:50:55,246 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-05 07:50:55,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-05 07:50:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2022-04-05 07:50:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2022-04-05 07:50:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-05 07:50:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions.
[2022-04-05 07:50:55,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23
[2022-04-05 07:50:55,253 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:50:55,253 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions.
[2022-04-05 07:50:55,253 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)
[2022-04-05 07:50:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions.
[2022-04-05 07:50:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-04-05 07:50:55,254 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:50:55,254 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]
[2022-04-05 07:50:55,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-04-05 07:50:55,459 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
[2022-04-05 07:50:55,460 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:50:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:50:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times
[2022-04-05 07:50:55,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:50:55,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243356460]
[2022-04-05 07:50:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:55,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:50:55,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:50:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158048728]
[2022-04-05 07:50:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:50:55,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:50:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:50:55,474 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)
[2022-04-05 07:50:55,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-04-05 07:50:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:50:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-04-05 07:50:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:50:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:50:56,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-05 07:50:56,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:50:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243356460]
[2022-04-05 07:50:56,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:50:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158048728]
[2022-04-05 07:50:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158048728] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-05 07:50:56,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-05 07:50:56,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-05 07:50:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302942698]
[2022-04-05 07:50:56,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:50:56,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-05 07:50:56,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:50:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-05 07:50:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-04-05 07:50:56,600 INFO L87 Difference]: Start difference. First operand 34 states and 43 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)
[2022-04-05 07:51:00,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-05 07:51:02,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-05 07:51:03,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-04-05 07:51:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:03,431 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions.
[2022-04-05 07:51:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-04-05 07:51:03,432 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
[2022-04-05 07:51:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:03,433 INFO L225 Difference]: With dead ends: 53
[2022-04-05 07:51:03,433 INFO L226 Difference]: Without dead ends: 51
[2022-04-05 07:51:03,434 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
[2022-04-05 07:51:03,434 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:03,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time]
[2022-04-05 07:51:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2022-04-05 07:51:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50.
[2022-04-05 07:51:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-04-05 07:51:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions.
[2022-04-05 07:51:03,446 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23
[2022-04-05 07:51:03,446 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:03,446 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions.
[2022-04-05 07:51:03,447 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)
[2022-04-05 07:51:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions.
[2022-04-05 07:51:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-04-05 07:51:03,448 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:03,448 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]
[2022-04-05 07:51:03,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:03,670 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
[2022-04-05 07:51:03,671 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times
[2022-04-05 07:51:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636350165]
[2022-04-05 07:51:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:03,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:03,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604896860]
[2022-04-05 07:51:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:03,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:03,695 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)
[2022-04-05 07:51:03,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-04-05 07:51:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core
[2022-04-05 07:51:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:03,886 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-05 07:51:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636350165]
[2022-04-05 07:51:04,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604896860]
[2022-04-05 07:51:04,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604896860] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-05 07:51:04,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-05 07:51:04,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10
[2022-04-05 07:51:04,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980909843]
[2022-04-05 07:51:04,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-05 07:51:04,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-04-05 07:51:04,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-04-05 07:51:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2022-04-05 07:51:04,076 INFO L87 Difference]: Start difference. First operand 50 states and 67 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)
[2022-04-05 07:51:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:04,223 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions.
[2022-04-05 07:51:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-04-05 07:51:04,225 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
[2022-04-05 07:51:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:04,226 INFO L225 Difference]: With dead ends: 57
[2022-04-05 07:51:04,226 INFO L226 Difference]: Without dead ends: 52
[2022-04-05 07:51:04,226 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
[2022-04-05 07:51:04,227 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:04,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-05 07:51:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2022-04-05 07:51:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36.
[2022-04-05 07:51:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-04-05 07:51:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions.
[2022-04-05 07:51:04,236 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29
[2022-04-05 07:51:04,236 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:04,236 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions.
[2022-04-05 07:51:04,236 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)
[2022-04-05 07:51:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions.
[2022-04-05 07:51:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-04-05 07:51:04,237 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:04,237 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, 1, 1, 1]
[2022-04-05 07:51:04,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:04,438 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
[2022-04-05 07:51:04,438 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times
[2022-04-05 07:51:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788386194]
[2022-04-05 07:51:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:04,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94292439]
[2022-04-05 07:51:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:04,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:04,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:04,453 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)
[2022-04-05 07:51:04,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-04-05 07:51:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-04-05 07:51:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:04,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-05 07:51:04,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:04,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788386194]
[2022-04-05 07:51:04,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:04,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94292439]
[2022-04-05 07:51:04,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94292439] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-05 07:51:04,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-05 07:51:04,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-04-05 07:51:04,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899213084]
[2022-04-05 07:51:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:51:04,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-04-05 07:51:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-04-05 07:51:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-04-05 07:51:04,566 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4)
[2022-04-05 07:51:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:04,592 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions.
[2022-04-05 07:51:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-04-05 07:51:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35
[2022-04-05 07:51:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:04,593 INFO L225 Difference]: With dead ends: 65
[2022-04-05 07:51:04,593 INFO L226 Difference]: Without dead ends: 44
[2022-04-05 07:51:04,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-04-05 07:51:04,594 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:04,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-05 07:51:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2022-04-05 07:51:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44.
[2022-04-05 07:51:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-04-05 07:51:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions.
[2022-04-05 07:51:04,603 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35
[2022-04-05 07:51:04,603 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:04,603 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions.
[2022-04-05 07:51:04,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4)
[2022-04-05 07:51:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions.
[2022-04-05 07:51:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-04-05 07:51:04,605 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:04,605 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:51:04,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:04,828 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
[2022-04-05 07:51:04,828 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times
[2022-04-05 07:51:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777824864]
[2022-04-05 07:51:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:04,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526474975]
[2022-04-05 07:51:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:04,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:04,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-05 07:51:04,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-04-05 07:51:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-05 07:51:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:04,978 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-05 07:51:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-04-05 07:51:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777824864]
[2022-04-05 07:51:05,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:05,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526474975]
[2022-04-05 07:51:05,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526474975] provided 1 perfect and 1 imperfect interpolant sequences
[2022-04-05 07:51:05,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-04-05 07:51:05,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9
[2022-04-05 07:51:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098806204]
[2022-04-05 07:51:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:51:05,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-04-05 07:51:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-04-05 07:51:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-04-05 07:51:05,085 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5)
[2022-04-05 07:51:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:05,125 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions.
[2022-04-05 07:51:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-04-05 07:51:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41
[2022-04-05 07:51:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:05,127 INFO L225 Difference]: With dead ends: 74
[2022-04-05 07:51:05,127 INFO L226 Difference]: Without dead ends: 53
[2022-04-05 07:51:05,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-04-05 07:51:05,128 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:05,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-05 07:51:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2022-04-05 07:51:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52.
[2022-04-05 07:51:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-04-05 07:51:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions.
[2022-04-05 07:51:05,137 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41
[2022-04-05 07:51:05,137 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:05,137 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions.
[2022-04-05 07:51:05,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5)
[2022-04-05 07:51:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions.
[2022-04-05 07:51:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2022-04-05 07:51:05,138 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:05,138 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:51:05,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:05,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:05,361 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times
[2022-04-05 07:51:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966485125]
[2022-04-05 07:51:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:05,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406131330]
[2022-04-05 07:51:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:05,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:05,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-05 07:51:05,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-04-05 07:51:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-04-05 07:51:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:05,521 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-05 07:51:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2022-04-05 07:51:05,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966485125]
[2022-04-05 07:51:05,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406131330]
[2022-04-05 07:51:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406131330] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-05 07:51:05,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-05 07:51:05,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9
[2022-04-05 07:51:05,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657260319]
[2022-04-05 07:51:05,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-05 07:51:05,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-04-05 07:51:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-04-05 07:51:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-04-05 07:51:05,623 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 7 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10)
[2022-04-05 07:51:05,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:05,719 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions.
[2022-04-05 07:51:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2022-04-05 07:51:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 7 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 43
[2022-04-05 07:51:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:05,721 INFO L225 Difference]: With dead ends: 108
[2022-04-05 07:51:05,721 INFO L226 Difference]: Without dead ends: 87
[2022-04-05 07:51:05,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132
[2022-04-05 07:51:05,722 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:05,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 193 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-05 07:51:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2022-04-05 07:51:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79.
[2022-04-05 07:51:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 57 states have internal predecessors, (67), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13)
[2022-04-05 07:51:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions.
[2022-04-05 07:51:05,737 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 43
[2022-04-05 07:51:05,737 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:05,737 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions.
[2022-04-05 07:51:05,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 7 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10)
[2022-04-05 07:51:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions.
[2022-04-05 07:51:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2022-04-05 07:51:05,738 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:05,738 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 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]
[2022-04-05 07:51:05,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:05,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:05,956 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times
[2022-04-05 07:51:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:05,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928510900]
[2022-04-05 07:51:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:05,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:05,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427458429]
[2022-04-05 07:51:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:05,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:05,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-05 07:51:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-04-05 07:51:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:06,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-04-05 07:51:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-04-05 07:51:06,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-04-05 07:51:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928510900]
[2022-04-05 07:51:06,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427458429]
[2022-04-05 07:51:06,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427458429] provided 1 perfect and 0 imperfect interpolant sequences
[2022-04-05 07:51:06,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-04-05 07:51:06,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-04-05 07:51:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104042587]
[2022-04-05 07:51:06,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-04-05 07:51:06,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-04-05 07:51:06,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-04-05 07:51:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-04-05 07:51:06,108 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)
[2022-04-05 07:51:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:06,159 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions.
[2022-04-05 07:51:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-04-05 07:51:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47
[2022-04-05 07:51:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:06,162 INFO L225 Difference]: With dead ends: 132
[2022-04-05 07:51:06,162 INFO L226 Difference]: Without dead ends: 101
[2022-04-05 07:51:06,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-04-05 07:51:06,163 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 19 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:06,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 129 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-04-05 07:51:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2022-04-05 07:51:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91.
[2022-04-05 07:51:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 66 states have internal predecessors, (79), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-05 07:51:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions.
[2022-04-05 07:51:06,178 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 47
[2022-04-05 07:51:06,178 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:06,178 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions.
[2022-04-05 07:51:06,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)
[2022-04-05 07:51:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions.
[2022-04-05 07:51:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2022-04-05 07:51:06,179 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:06,180 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:51:06,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:06,399 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,SelfDestructingSolverStorable7
[2022-04-05 07:51:06,400 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times
[2022-04-05 07:51:06,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:06,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318069084]
[2022-04-05 07:51:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:06,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644118379]
[2022-04-05 07:51:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:06,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:06,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:06,409 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)
[2022-04-05 07:51:06,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-04-05 07:51:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-04-05 07:51:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:06,571 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-05 07:51:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2022-04-05 07:51:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318069084]
[2022-04-05 07:51:06,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:06,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644118379]
[2022-04-05 07:51:06,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644118379] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-05 07:51:06,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-05 07:51:06,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2022-04-05 07:51:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031597724]
[2022-04-05 07:51:06,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-05 07:51:06,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-04-05 07:51:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-04-05 07:51:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2022-04-05 07:51:06,678 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12)
[2022-04-05 07:51:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:06,758 INFO L93 Difference]: Finished difference Result 132 states and 171 transitions.
[2022-04-05 07:51:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-04-05 07:51:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 49
[2022-04-05 07:51:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:06,760 INFO L225 Difference]: With dead ends: 132
[2022-04-05 07:51:06,760 INFO L226 Difference]: Without dead ends: 95
[2022-04-05 07:51:06,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2022-04-05 07:51:06,761 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:06,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 162 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-05 07:51:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2022-04-05 07:51:06,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94.
[2022-04-05 07:51:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 68 states have internal predecessors, (82), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-05 07:51:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions.
[2022-04-05 07:51:06,774 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 49
[2022-04-05 07:51:06,774 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:06,774 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions.
[2022-04-05 07:51:06,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 7 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12)
[2022-04-05 07:51:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions.
[2022-04-05 07:51:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2022-04-05 07:51:06,776 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:06,776 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:51:06,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:06,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:06,991 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times
[2022-04-05 07:51:06,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:06,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801159865]
[2022-04-05 07:51:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:06,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:07,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:07,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847508711]
[2022-04-05 07:51:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:07,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:07,001 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)
[2022-04-05 07:51:07,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-04-05 07:51:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-04-05 07:51:07,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-04-05 07:51:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-04-05 07:51:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-04-05 07:51:07,203 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-04-05 07:51:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2022-04-05 07:51:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-04-05 07:51:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801159865]
[2022-04-05 07:51:07,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-04-05 07:51:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847508711]
[2022-04-05 07:51:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847508711] provided 0 perfect and 2 imperfect interpolant sequences
[2022-04-05 07:51:07,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-04-05 07:51:07,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2022-04-05 07:51:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131233434]
[2022-04-05 07:51:07,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-04-05 07:51:07,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-04-05 07:51:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-04-05 07:51:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-04-05 07:51:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-04-05 07:51:07,308 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13)
[2022-04-05 07:51:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-04-05 07:51:07,377 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions.
[2022-04-05 07:51:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-04-05 07:51:07,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55
[2022-04-05 07:51:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-04-05 07:51:07,378 INFO L225 Difference]: With dead ends: 101
[2022-04-05 07:51:07,378 INFO L226 Difference]: Without dead ends: 96
[2022-04-05 07:51:07,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72
[2022-04-05 07:51:07,379 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 35 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-04-05 07:51:07,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 153 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-04-05 07:51:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2022-04-05 07:51:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96.
[2022-04-05 07:51:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 18 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2022-04-05 07:51:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions.
[2022-04-05 07:51:07,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 55
[2022-04-05 07:51:07,391 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-04-05 07:51:07,391 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions.
[2022-04-05 07:51:07,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13)
[2022-04-05 07:51:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions.
[2022-04-05 07:51:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2022-04-05 07:51:07,392 INFO L491 BasicCegarLoop]: Found error trace
[2022-04-05 07:51:07,393 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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, 1, 1]
[2022-04-05 07:51:07,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:07,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-04-05 07:51:07,607 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-04-05 07:51:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-04-05 07:51:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times
[2022-04-05 07:51:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-04-05 07:51:07,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212385837]
[2022-04-05 07:51:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-04-05 07:51:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-04-05 07:51:07,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-04-05 07:51:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792169631]
[2022-04-05 07:51:07,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-04-05 07:51:07,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-04-05 07:51:07,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-04-05 07:51:07,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-04-05 07:51:07,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2022-04-05 07:51:07,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-04-05 07:51:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2022-04-05 07:51:07,687 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-04-05 07:51:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-04-05 07:51:07,732 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2022-04-05 07:51:07,732 INFO L618 BasicCegarLoop]: Counterexample is feasible
[2022-04-05 07:51:07,733 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-04-05 07:51:07,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2022-04-05 07:51:07,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-04-05 07:51:07,937 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-04-05 07:51:07,939 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2022-04-05 07:51:07,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:51:07 BasicIcfg
[2022-04-05 07:51:07,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-04-05 07:51:07,969 INFO L158 Benchmark]: Toolchain (without parser) took 14317.83ms. Allocated memory was 170.9MB in the beginning and 211.8MB in the end (delta: 40.9MB). Free memory was 119.4MB in the beginning and 180.0MB in the end (delta: -60.6MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-04-05 07:51:07,970 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 170.9MB. Free memory was 135.7MB in the beginning and 135.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB.
[2022-04-05 07:51:07,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.85ms. Allocated memory is still 170.9MB. Free memory was 119.3MB in the beginning and 146.2MB in the end (delta: -26.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB.
[2022-04-05 07:51:07,970 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 170.9MB. Free memory was 146.2MB in the beginning and 144.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-04-05 07:51:07,970 INFO L158 Benchmark]: RCFGBuilder took 351.65ms. Allocated memory is still 170.9MB. Free memory was 144.7MB in the beginning and 133.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-04-05 07:51:07,971 INFO L158 Benchmark]: IcfgTransformer took 19.87ms. Allocated memory is still 170.9MB. Free memory was 133.1MB in the beginning and 131.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
[2022-04-05 07:51:07,971 INFO L158 Benchmark]: TraceAbstraction took 13617.00ms. Allocated memory was 170.9MB in the beginning and 211.8MB in the end (delta: 40.9MB). Free memory was 131.0MB in the beginning and 180.0MB in the end (delta: -49.0MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-04-05 07:51:07,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.11ms. Allocated memory is still 170.9MB. Free memory was 135.7MB in the beginning and 135.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 286.85ms. Allocated memory is still 170.9MB. Free memory was 119.3MB in the beginning and 146.2MB in the end (delta: -26.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 36.26ms. Allocated memory is still 170.9MB. Free memory was 146.2MB in the beginning and 144.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* RCFGBuilder took 351.65ms. Allocated memory is still 170.9MB. Free memory was 144.7MB in the beginning and 133.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
* IcfgTransformer took 19.87ms. Allocated memory is still 170.9MB. Free memory was 133.1MB in the beginning and 131.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB.
* TraceAbstraction took 13617.00ms. Allocated memory was 170.9MB in the beginning and 211.8MB in the end (delta: 40.9MB). Free memory was 131.0MB in the beginning and 180.0MB in the end (delta: -49.0MB). There was no memory consumed. 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()
[L25] 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]
[L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A)
VAL [\old(counter)=0, A=3, counter=0, R=0]
[L27] 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]
[L27] RET assume_abort_if_not(A % 2 == 1)
VAL [\old(counter)=0, A=3, counter=0, R=0]
[L29] u = ((long long) 2 * R) + 1
[L30] v = 1
[L31] r = ((long long) R * R) - A
VAL [\old(counter)=0, A=3, counter=0, r=-3, R=0, u=1, v=1]
[L34] EXPR counter++
VAL [\old(counter)=0, A=3, counter=1, counter++=0, r=-3, R=0, u=1, v=1]
[L34] COND TRUE counter++<5
[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=3, counter=1, R=0, r=-3, u=1, v=1]
[L36] COND FALSE !(!(r != 0))
VAL [\old(counter)=0, A=3, counter=1, r=-3, R=0, u=1, v=1]
[L39] EXPR counter++
VAL [\old(counter)=0, A=3, counter=2, counter++=1, R=0, r=-3, u=1, v=1]
[L39] COND TRUE counter++<5
[L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=1, \old(counter)=0, counter=2]
[L12] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2]
[L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(counter)=0, A=3, counter=2, r=-3, R=0, u=1, v=1]
[L41] COND TRUE !(r > 0)
VAL [\old(counter)=0, A=3, counter=2, r=-3, R=0, u=1, v=1]
[L47] EXPR counter++
VAL [\old(counter)=0, A=3, counter=3, counter++=2, R=0, r=-3, u=1, v=1]
[L47] COND TRUE counter++<5
[L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=1, \old(counter)=0, counter=3]
[L12] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3]
[L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(counter)=0, A=3, counter=3, R=0, r=-3, u=1, v=1]
[L49] COND FALSE !(!(r < 0))
[L51] r = r + u
[L52] u = u + 2
VAL [\old(counter)=0, A=3, counter=3, r=-2, R=0, u=3, v=1]
[L47] EXPR counter++
VAL [\old(counter)=0, A=3, counter=4, counter++=3, R=0, r=-2, u=3, v=1]
[L47] COND TRUE counter++<5
[L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=1, \old(counter)=0, counter=4]
[L12] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4]
[L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(counter)=0, A=3, counter=4, R=0, r=-2, u=3, v=1]
[L49] COND FALSE !(!(r < 0))
[L51] r = r + u
[L52] u = u + 2
VAL [\old(counter)=0, A=3, counter=4, r=1, R=0, u=5, v=1]
[L47] EXPR counter++
VAL [\old(counter)=0, A=3, counter=5, counter++=4, r=1, R=0, u=5, v=1]
[L47] COND TRUE counter++<5
[L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=1, \old(counter)=0, counter=5]
[L12] COND FALSE !(!(cond))
VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5]
[L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v)
VAL [\old(counter)=0, A=3, counter=5, R=0, r=1, u=5, v=1]
[L49] COND TRUE !(r < 0)
VAL [\old(counter)=0, A=3, counter=5, r=1, R=0, u=5, v=1]
[L34] EXPR counter++
VAL [\old(counter)=0, A=3, counter=6, counter++=5, R=0, r=1, u=5, v=1]
[L34] COND FALSE !(counter++<5)
[L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v)
VAL [\old(cond)=0, \old(counter)=0, counter=6]
[L12] COND TRUE !(cond)
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6]
[L14] reach_error()
VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.5s, OverallIterations: 11, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 265 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 256 mSDsluCounter, 1213 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 804 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 340 IncrementalHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 409 mSDtfsCounter, 340 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 584 GetRequests, 524 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=10, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 37 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 569 ConstructedInterpolants, 0 QuantifiedInterpolants, 1371 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1204 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 186/252 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!
[2022-04-05 07:51:07,986 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...