/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.2-dev-d966a43
[2022-01-31 16:13:17,953 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-01-31 16:13:17,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-01-31 16:13:17,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-01-31 16:13:17,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-01-31 16:13:17,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-01-31 16:13:17,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-01-31 16:13:17,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-01-31 16:13:17,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-01-31 16:13:17,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-01-31 16:13:17,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-01-31 16:13:17,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-01-31 16:13:17,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-01-31 16:13:17,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-01-31 16:13:17,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-31 16:13:17,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-31 16:13:17,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-31 16:13:17,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-31 16:13:18,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-31 16:13:18,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-31 16:13:18,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-31 16:13:18,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-31 16:13:18,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-01-31 16:13:18,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-31 16:13:18,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-01-31 16:13:18,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-01-31 16:13:18,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-01-31 16:13:18,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-01-31 16:13:18,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-01-31 16:13:18,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-31 16:13:18,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-01-31 16:13:18,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-01-31 16:13:18,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-01-31 16:13:18,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-01-31 16:13:18,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-31 16:13:18,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-01-31 16:13:18,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-01-31 16:13:18,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-01-31 16:13:18,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-01-31 16:13:18,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-01-31 16:13:18,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-01-31 16:13:18,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf
[2022-01-31 16:13:18,054 INFO L113 SettingsManager]: Loading preferences was successful
[2022-01-31 16:13:18,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-31 16:13:18,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * sizeof long=4
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-01-31 16:13:18,056 INFO L138 SettingsManager]: * sizeof long double=12
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-01-31 16:13:18,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * To the following directory=./dump/
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-01-31 16:13:18,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 16:13:18,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-31 16:13:18,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-01-31 16:13:18,058 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2022-01-31 16:13:18,058 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-31 16:13:18,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-31 16:13:18,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-31 16:13:18,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-31 16:13:18,303 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-01-31 16:13:18,303 INFO L275 PluginConnector]: CDTParser initialized
[2022-01-31 16:13:18,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c
[2022-01-31 16:13:18,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5ba667e/669a06080af24957bb1500f6f1e8076d/FLAGb1debc64c
[2022-01-31 16:13:18,656 INFO L306 CDTParser]: Found 1 translation units.
[2022-01-31 16:13:18,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c
[2022-01-31 16:13:18,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5ba667e/669a06080af24957bb1500f6f1e8076d/FLAGb1debc64c
[2022-01-31 16:13:19,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5ba667e/669a06080af24957bb1500f6f1e8076d
[2022-01-31 16:13:19,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-31 16:13:19,078 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-31 16:13:19,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-31 16:13:19,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-31 16:13:19,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-31 16:13:19,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653d79d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19, skipping insertion in model container
[2022-01-31 16:13:19,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-01-31 16:13:19,103 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-01-31 16:13:19,217 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/sqrt1-ll_unwindbound10.c[520,533]
[2022-01-31 16:13:19,233 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-01-31 16:13:19,240 INFO L203 MainTranslator]: Completed pre-run
[2022-01-31 16:13:19,260 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/sqrt1-ll_unwindbound10.c[520,533]
[2022-01-31 16:13:19,279 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-01-31 16:13:19,323 INFO L208 MainTranslator]: Completed translation
[2022-01-31 16:13:19,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19 WrapperNode
[2022-01-31 16:13:19,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-31 16:13:19,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-31 16:13:19,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-31 16:13:19,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-01-31 16:13:19,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-31 16:13:19,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-31 16:13:19,374 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-01-31 16:13:19,375 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-01-31 16:13:19,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-31 16:13:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:19,400 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)
[2022-01-31 16:13:19,414 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
[2022-01-31 16:13:19,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2022-01-31 16:13:19,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-31 16:13:19,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2022-01-31 16:13:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-01-31 16:13:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-01-31 16:13:19,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2022-01-31 16:13:19,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2022-01-31 16:13:19,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2022-01-31 16:13:19,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2022-01-31 16:13:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-31 16:13:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2022-01-31 16:13:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-01-31 16:13:19,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-01-31 16:13:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2022-01-31 16:13:19,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2022-01-31 16:13:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-01-31 16:13:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-31 16:13:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-01-31 16:13:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2022-01-31 16:13:19,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-01-31 16:13:19,492 INFO L234 CfgBuilder]: Building ICFG
[2022-01-31 16:13:19,493 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-31 16:13:19,595 INFO L275 CfgBuilder]: Performing block encoding
[2022-01-31 16:13:19,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-31 16:13:19,599 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2022-01-31 16:13:19,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:19 BoogieIcfgContainer
[2022-01-31 16:13:19,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-31 16:13:19,602 INFO L113 PluginConnector]: ------------------------IcfgTransformer----------------------------
[2022-01-31 16:13:19,602 INFO L271 PluginConnector]: Initializing IcfgTransformer...
[2022-01-31 16:13:19,602 INFO L275 PluginConnector]: IcfgTransformer initialized
[2022-01-31 16:13:19,605 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:19" (1/1) ...
[2022-01-31 16:13:19,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:13:19 BasicIcfg
[2022-01-31 16:13:19,628 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer----------------------------
[2022-01-31 16:13:19,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-31 16:13:19,630 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-01-31 16:13:19,643 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-01-31 16:13:19,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:13:19" (1/4) ...
[2022-01-31 16:13:19,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700835a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:13:19, skipping insertion in model container
[2022-01-31 16:13:19,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:13:19" (2/4) ...
[2022-01-31 16:13:19,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700835a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:13:19, skipping insertion in model container
[2022-01-31 16:13:19,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:13:19" (3/4) ...
[2022-01-31 16:13:19,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700835a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:13:19, skipping insertion in model container
[2022-01-31 16:13:19,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 04:13:19" (4/4) ...
[2022-01-31 16:13:19,646 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.cJordan
[2022-01-31 16:13:19,651 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION
[2022-01-31 16:13:19,652 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-31 16:13:19,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-31 16:13:19,695 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR
[2022-01-31 16:13:19,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-31 16:13:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-01-31 16:13:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-31 16:13:19,711 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:19,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:19,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times
[2022-01-31 16:13:19,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:19,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916307019]
[2022-01-31 16:13:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:19,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 16:13:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-31 16:13:19,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916307019]
[2022-01-31 16:13:19,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916307019] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 16:13:19,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 16:13:19,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-31 16:13:19,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803782935]
[2022-01-31 16:13:19,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-31 16:13:19,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-31 16:13:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 16:13:19,872 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:19,926 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions.
[2022-01-31 16:13:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-01-31 16:13:19,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-01-31 16:13:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:19,935 INFO L225 Difference]: With dead ends: 27
[2022-01-31 16:13:19,935 INFO L226 Difference]: Without dead ends: 22
[2022-01-31 16:13:19,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-31 16:13:19,939 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:19,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 16:13:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-01-31 16:13:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21.
[2022-01-31 16:13:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-31 16:13:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions.
[2022-01-31 16:13:19,976 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11
[2022-01-31 16:13:19,976 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:19,977 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions.
[2022-01-31 16:13:19,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions.
[2022-01-31 16:13:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-31 16:13:19,979 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:19,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-01-31 16:13:19,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times
[2022-01-31 16:13:19,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687675865]
[2022-01-31 16:13:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:19,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 16:13:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-31 16:13:20,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687675865]
[2022-01-31 16:13:20,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687675865] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 16:13:20,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 16:13:20,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-01-31 16:13:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910446546]
[2022-01-31 16:13:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:20,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-31 16:13:20,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-31 16:13:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-31 16:13:20,119 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:20,204 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions.
[2022-01-31 16:13:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-01-31 16:13:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-01-31 16:13:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:20,206 INFO L225 Difference]: With dead ends: 23
[2022-01-31 16:13:20,206 INFO L226 Difference]: Without dead ends: 23
[2022-01-31 16:13:20,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-31 16:13:20,211 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:20,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 16:13:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2022-01-31 16:13:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2022-01-31 16:13:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2022-01-31 16:13:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions.
[2022-01-31 16:13:20,222 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12
[2022-01-31 16:13:20,222 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions.
[2022-01-31 16:13:20,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions.
[2022-01-31 16:13:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2022-01-31 16:13:20,230 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:20,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:20,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-01-31 16:13:20,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times
[2022-01-31 16:13:20,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:20,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826709648]
[2022-01-31 16:13:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:20,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2022-01-31 16:13:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-31 16:13:20,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826709648]
[2022-01-31 16:13:20,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826709648] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 16:13:20,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 16:13:20,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-01-31 16:13:20,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276648898]
[2022-01-31 16:13:20,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:20,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-01-31 16:13:20,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:20,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-01-31 16:13:20,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2022-01-31 16:13:20,337 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:20,485 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions.
[2022-01-31 16:13:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-01-31 16:13:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12
[2022-01-31 16:13:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:20,488 INFO L225 Difference]: With dead ends: 34
[2022-01-31 16:13:20,488 INFO L226 Difference]: Without dead ends: 34
[2022-01-31 16:13:20,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2022-01-31 16:13:20,494 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:20,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 16:13:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2022-01-31 16:13:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2022-01-31 16:13:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10)
[2022-01-31 16:13:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions.
[2022-01-31 16:13:20,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12
[2022-01-31 16:13:20,509 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:20,509 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions.
[2022-01-31 16:13:20,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-01-31 16:13:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions.
[2022-01-31 16:13:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-31 16:13:20,510 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:20,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:20,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-01-31 16:13:20,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times
[2022-01-31 16:13:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:20,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041102117]
[2022-01-31 16:13:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:20,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:20,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-31 16:13:20,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929738430]
[2022-01-31 16:13:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:20,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:20,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:20,541 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)
[2022-01-31 16:13:20,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-01-31 16:13:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-31 16:13:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-01-31 16:13:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-31 16:13:20,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-31 16:13:20,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:20,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041102117]
[2022-01-31 16:13:20,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-31 16:13:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929738430]
[2022-01-31 16:13:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929738430] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 16:13:20,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 16:13:20,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-31 16:13:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106842841]
[2022-01-31 16:13:20,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:20,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-31 16:13:20,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:20,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-31 16:13:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-31 16:13:20,715 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-31 16:13:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:20,751 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions.
[2022-01-31 16:13:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-01-31 16:13:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17
[2022-01-31 16:13:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:20,754 INFO L225 Difference]: With dead ends: 38
[2022-01-31 16:13:20,754 INFO L226 Difference]: Without dead ends: 38
[2022-01-31 16:13:20,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-31 16:13:20,755 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:20,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 16:13:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-01-31 16:13:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37.
[2022-01-31 16:13:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2022-01-31 16:13:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions.
[2022-01-31 16:13:20,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17
[2022-01-31 16:13:20,764 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:20,764 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions.
[2022-01-31 16:13:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-01-31 16:13:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions.
[2022-01-31 16:13:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2022-01-31 16:13:20,765 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:20,765 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:20,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-01-31 16:13:20,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:20,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times
[2022-01-31 16:13:20,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:20,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267426801]
[2022-01-31 16:13:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:20,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:20,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-31 16:13:20,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652069595]
[2022-01-31 16:13:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:20,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:20,992 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)
[2022-01-31 16:13:20,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-01-31 16:13:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-31 16:13:21,033 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-01-31 16:13:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-01-31 16:13:21,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-31 16:13:21,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267426801]
[2022-01-31 16:13:21,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-31 16:13:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652069595]
[2022-01-31 16:13:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652069595] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-31 16:13:21,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-31 16:13:21,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-01-31 16:13:21,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103467114]
[2022-01-31 16:13:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:21,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-31 16:13:21,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-31 16:13:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-01-31 16:13:21,101 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-31 16:13:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:21,128 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions.
[2022-01-31 16:13:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-01-31 16:13:21,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22
[2022-01-31 16:13:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:21,129 INFO L225 Difference]: With dead ends: 42
[2022-01-31 16:13:21,129 INFO L226 Difference]: Without dead ends: 39
[2022-01-31 16:13:21,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-01-31 16:13:21,130 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:21,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 16:13:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2022-01-31 16:13:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2022-01-31 16:13:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-01-31 16:13:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions.
[2022-01-31 16:13:21,135 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22
[2022-01-31 16:13:21,135 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions.
[2022-01-31 16:13:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2022-01-31 16:13:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions.
[2022-01-31 16:13:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-31 16:13:21,136 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:21,136 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:21,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-01-31 16:13:21,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:21,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times
[2022-01-31 16:13:21,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327447153]
[2022-01-31 16:13:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:21,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:21,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-31 16:13:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486459827]
[2022-01-31 16:13:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:21,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:21,372 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)
[2022-01-31 16:13:21,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-01-31 16:13:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-01-31 16:13:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-01-31 16:13:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-31 16:13:21,509 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-01-31 16:13:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-31 16:13:21,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327447153]
[2022-01-31 16:13:21,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-31 16:13:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486459827]
[2022-01-31 16:13:21,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486459827] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-31 16:13:21,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-31 16:13:21,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2022-01-31 16:13:21,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907686840]
[2022-01-31 16:13:21,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-31 16:13:21,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-31 16:13:21,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-31 16:13:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2022-01-31 16:13:21,604 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)
[2022-01-31 16:13:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:21,684 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions.
[2022-01-31 16:13:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-01-31 16:13:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30
[2022-01-31 16:13:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:21,685 INFO L225 Difference]: With dead ends: 71
[2022-01-31 16:13:21,686 INFO L226 Difference]: Without dead ends: 71
[2022-01-31 16:13:21,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-01-31 16:13:21,686 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:21,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 116 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 16:13:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2022-01-31 16:13:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67.
[2022-01-31 16:13:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19)
[2022-01-31 16:13:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions.
[2022-01-31 16:13:21,693 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30
[2022-01-31 16:13:21,694 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:21,694 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions.
[2022-01-31 16:13:21,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)
[2022-01-31 16:13:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions.
[2022-01-31 16:13:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-01-31 16:13:21,695 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:21,695 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:21,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-01-31 16:13:21,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:21,912 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times
[2022-01-31 16:13:21,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681921432]
[2022-01-31 16:13:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:21,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:21,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-31 16:13:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525094363]
[2022-01-31 16:13:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:21,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:21,922 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)
[2022-01-31 16:13:21,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-01-31 16:13:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-31 16:13:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-01-31 16:13:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-01-31 16:13:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-01-31 16:13:22,085 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-01-31 16:13:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2022-01-31 16:13:22,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681921432]
[2022-01-31 16:13:22,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-31 16:13:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525094363]
[2022-01-31 16:13:22,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525094363] provided 1 perfect and 1 imperfect interpolant sequences
[2022-01-31 16:13:22,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2022-01-31 16:13:22,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7
[2022-01-31 16:13:22,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353038535]
[2022-01-31 16:13:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-31 16:13:22,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-01-31 16:13:22,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-01-31 16:13:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2022-01-31 16:13:22,181 INFO L87 Difference]: Start difference. First operand 67 states and 85 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-31 16:13:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:22,226 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions.
[2022-01-31 16:13:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-01-31 16:13:22,228 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30
[2022-01-31 16:13:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:22,230 INFO L225 Difference]: With dead ends: 79
[2022-01-31 16:13:22,230 INFO L226 Difference]: Without dead ends: 79
[2022-01-31 16:13:22,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-01-31 16:13:22,231 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:22,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-31 16:13:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2022-01-31 16:13:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79.
[2022-01-31 16:13:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19)
[2022-01-31 16:13:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions.
[2022-01-31 16:13:22,241 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30
[2022-01-31 16:13:22,241 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:22,241 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions.
[2022-01-31 16:13:22,241 INFO L471 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2022-01-31 16:13:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions.
[2022-01-31 16:13:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-01-31 16:13:22,242 INFO L506 BasicCegarLoop]: Found error trace
[2022-01-31 16:13:22,242 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:22,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-01-31 16:13:22,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:22,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-31 16:13:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-01-31 16:13:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times
[2022-01-31 16:13:22,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-01-31 16:13:22,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809658548]
[2022-01-31 16:13:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-31 16:13:22,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-01-31 16:13:22,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-01-31 16:13:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338496291]
[2022-01-31 16:13:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-31 16:13:22,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-31 16:13:22,476 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)
[2022-01-31 16:13:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-01-31 16:13:22,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-31 16:13:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-31 16:13:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-01-31 16:13:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-01-31 16:13:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-01-31 16:13:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-01-31 16:13:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-01-31 16:13:22,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-01-31 16:13:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809658548]
[2022-01-31 16:13:22,718 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-01-31 16:13:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338496291]
[2022-01-31 16:13:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338496291] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-31 16:13:22,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-31 16:13:22,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2022-01-31 16:13:22,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402418406]
[2022-01-31 16:13:22,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-31 16:13:22,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-01-31 16:13:22,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-01-31 16:13:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-01-31 16:13:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-01-31 16:13:22,719 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)
[2022-01-31 16:13:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-31 16:13:22,828 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions.
[2022-01-31 16:13:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-01-31 16:13:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35
[2022-01-31 16:13:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-31 16:13:22,829 INFO L225 Difference]: With dead ends: 77
[2022-01-31 16:13:22,829 INFO L226 Difference]: Without dead ends: 0
[2022-01-31 16:13:22,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2022-01-31 16:13:22,830 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-31 16:13:22,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-01-31 16:13:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2022-01-31 16:13:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2022-01-31 16:13:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-31 16:13:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2022-01-31 16:13:22,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35
[2022-01-31 16:13:22,831 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-01-31 16:13:22,831 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2022-01-31 16:13:22,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)
[2022-01-31 16:13:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2022-01-31 16:13:22,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2022-01-31 16:13:22,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-01-31 16:13:22,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-01-31 16:13:23,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-01-31 16:13:23,042 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1]
[2022-01-31 16:13:23,043 INFO L180 ceAbstractionStarter]: Computing trace abstraction results
[2022-01-31 16:13:23,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:13:23 BasicIcfg
[2022-01-31 16:13:23,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-01-31 16:13:23,045 INFO L158 Benchmark]: Toolchain (without parser) took 3967.56ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 127.8MB in the beginning and 154.7MB in the end (delta: -26.8MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB.
[2022-01-31 16:13:23,045 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 182.5MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 16:13:23,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.66ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 127.6MB in the beginning and 201.5MB in the end (delta: -73.9MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB.
[2022-01-31 16:13:23,046 INFO L158 Benchmark]: Boogie Preprocessor took 48.44ms. Allocated memory is still 226.5MB. Free memory was 201.5MB in the beginning and 200.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB.
[2022-01-31 16:13:23,046 INFO L158 Benchmark]: RCFGBuilder took 226.67ms. Allocated memory is still 226.5MB. Free memory was 200.0MB in the beginning and 188.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
[2022-01-31 16:13:23,046 INFO L158 Benchmark]: IcfgTransformer took 27.09ms. Allocated memory is still 226.5MB. Free memory was 188.5MB in the beginning and 187.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
[2022-01-31 16:13:23,047 INFO L158 Benchmark]: TraceAbstraction took 3414.87ms. Allocated memory is still 226.5MB. Free memory was 186.9MB in the beginning and 154.7MB in the end (delta: 32.3MB). Peak memory consumption was 33.3MB. Max. memory is 8.0GB.
[2022-01-31 16:13:23,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.53ms. Allocated memory is still 182.5MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB.
* CACSL2BoogieTranslator took 245.66ms. Allocated memory was 182.5MB in the beginning and 226.5MB in the end (delta: 44.0MB). Free memory was 127.6MB in the beginning and 201.5MB in the end (delta: -73.9MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB.
* Boogie Preprocessor took 48.44ms. Allocated memory is still 226.5MB. Free memory was 201.5MB in the beginning and 200.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB.
* RCFGBuilder took 226.67ms. Allocated memory is still 226.5MB. Free memory was 200.0MB in the beginning and 188.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB.
* IcfgTransformer took 27.09ms. Allocated memory is still 226.5MB. Free memory was 188.5MB in the beginning and 187.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB.
* TraceAbstraction took 3414.87ms. Allocated memory is still 226.5MB. Free memory was 186.9MB in the beginning and 154.7MB in the end (delta: 32.3MB). Peak memory consumption was 33.3MB. 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
- PositiveResult [Line: 14]: call to reach_error is unreachable
For all program executions holds that call to reach_error is unreachable at this location
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 651 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 427 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 343 IncrementalHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 224 mSDtfsCounter, 343 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, 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, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 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
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2022-01-31 16:13:23,069 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...