/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:24:34,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:24:34,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:24:34,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 20:24:34,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 20:24:34,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 20:24:34,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 20:24:34,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 20:24:34,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 20:24:34,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 20:24:34,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 20:24:34,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 20:24:34,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:24:34,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:24:34,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:24:34,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:24:34,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:24:34,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:24:34,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:24:34,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:24:34,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:24:34,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:24:34,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:24:34,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:24:34,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:24:34,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 20:24:34,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 20:24:34,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 20:24:34,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 20:24:34,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 20:24:34,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 20:24:34,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 20:24:34,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 20:24:34,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:24:34,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:24:34,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:24:34,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:24:34,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:24:34,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:24:34,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:24:34,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:24:34,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:24:34,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:24:34,841 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:24:34,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:24:34,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:24:34,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:24:34,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:24:34,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:24:34,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:24:34,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:24:34,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:24:34,844 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:24:34,844 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:24:34,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:24:35,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:24:35,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:24:35,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:24:35,020 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:24:35,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-01-10 20:24:35,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54af71366/965aa795f87044248596fd729f67f252/FLAGcdff02883 [2022-01-10 20:24:35,465 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:24:35,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-01-10 20:24:35,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54af71366/965aa795f87044248596fd729f67f252/FLAGcdff02883 [2022-01-10 20:24:35,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54af71366/965aa795f87044248596fd729f67f252 [2022-01-10 20:24:35,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:24:35,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:24:35,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:24:35,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:24:35,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:24:35,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b45117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35, skipping insertion in model container [2022-01-10 20:24:35,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:24:35,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:24:35,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-01-10 20:24:35,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:24:35,662 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:24:35,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-01-10 20:24:35,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:24:35,694 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:24:35,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35 WrapperNode [2022-01-10 20:24:35,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:24:35,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:24:35,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:24:35,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:24:35,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,722 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-01-10 20:24:35,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:24:35,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:24:35,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:24:35,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:24:35,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:24:35,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:24:35,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:24:35,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:24:35,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:35,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:24:35,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:35,763 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) [2022-01-10 20:24:35,777 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 [2022-01-10 20:24:35,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:24:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:24:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:24:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:24:35,837 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:24:35,838 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:24:35,927 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:24:35,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:24:35,931 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 20:24:35,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:35 BoogieIcfgContainer [2022-01-10 20:24:35,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:24:35,933 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:24:35,933 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:24:35,935 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:24:35,937 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:35" (1/1) ... [2022-01-10 20:24:36,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:36 BasicIcfg [2022-01-10 20:24:36,011 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:24:36,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:24:36,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:24:36,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:24:36,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:24:35" (1/4) ... [2022-01-10 20:24:36,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b2fab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:36, skipping insertion in model container [2022-01-10 20:24:36,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:35" (2/4) ... [2022-01-10 20:24:36,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b2fab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:36, skipping insertion in model container [2022-01-10 20:24:36,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:35" (3/4) ... [2022-01-10 20:24:36,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b2fab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:24:36, skipping insertion in model container [2022-01-10 20:24:36,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:24:36" (4/4) ... [2022-01-10 20:24:36,021 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.cTransformedIcfg [2022-01-10 20:24:36,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:24:36,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:24:36,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:24:36,058 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 20:24:36,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:24:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-01-10 20:24:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 20:24:36,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 20:24:36,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash 101188209, now seen corresponding path program 1 times [2022-01-10 20:24:36,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430125081] [2022-01-10 20:24:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430125081] [2022-01-10 20:24:36,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430125081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:24:36,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498192270] [2022-01-10 20:24:36,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:24:36,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:24:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:24:36,245 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-01-10 20:24:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,265 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2022-01-10 20:24:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:24:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2022-01-10 20:24:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,272 INFO L225 Difference]: With dead ends: 36 [2022-01-10 20:24:36,272 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 20:24:36,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:24:36,278 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 20:24:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 20:24:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-01-10 20:24:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-01-10 20:24:36,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 5 [2022-01-10 20:24:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-01-10 20:24:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-01-10 20:24:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-01-10 20:24:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 20:24:36,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 20:24:36,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:24:36,306 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash 101189170, now seen corresponding path program 1 times [2022-01-10 20:24:36,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838094538] [2022-01-10 20:24:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838094538] [2022-01-10 20:24:36,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838094538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:24:36,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456940950] [2022-01-10 20:24:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:24:36,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:24:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:24:36,437 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-01-10 20:24:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,466 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-01-10 20:24:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:24:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2022-01-10 20:24:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,468 INFO L225 Difference]: With dead ends: 28 [2022-01-10 20:24:36,468 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 20:24:36,471 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 [2022-01-10 20:24:36,472 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 20:24:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-01-10 20:24:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-01-10 20:24:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-01-10 20:24:36,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 5 [2022-01-10 20:24:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-01-10 20:24:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-01-10 20:24:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-01-10 20:24:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 20:24:36,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:36,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:24:36,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash -508910719, now seen corresponding path program 1 times [2022-01-10 20:24:36,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236747355] [2022-01-10 20:24:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236747355] [2022-01-10 20:24:36,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236747355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:24:36,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000649992] [2022-01-10 20:24:36,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:24:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:24:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:24:36,576 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-01-10 20:24:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,597 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-10 20:24:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:24:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2022-01-10 20:24:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,598 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:24:36,598 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 20:24:36,600 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 [2022-01-10 20:24:36,605 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 20:24:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-01-10 20:24:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-01-10 20:24:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 20:24:36,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2022-01-10 20:24:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,613 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 20:24:36,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-01-10 20:24:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 20:24:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 20:24:36,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:36,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 20:24:36,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -69448731, now seen corresponding path program 1 times [2022-01-10 20:24:36,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142752679] [2022-01-10 20:24:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142752679] [2022-01-10 20:24:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142752679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:24:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758505569] [2022-01-10 20:24:36,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:24:36,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:24:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:24:36,682 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-10 20:24:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,696 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-01-10 20:24:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:24:36,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2022-01-10 20:24:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,697 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:24:36,697 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 20:24:36,698 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 [2022-01-10 20:24:36,698 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 20:24:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-01-10 20:24:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-01-10 20:24:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 20:24:36,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-01-10 20:24:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,701 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 20:24:36,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-10 20:24:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 20:24:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 20:24:36,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:36,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 20:24:36,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -4596652, now seen corresponding path program 1 times [2022-01-10 20:24:36,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242059748] [2022-01-10 20:24:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242059748] [2022-01-10 20:24:36,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242059748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:24:36,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274179355] [2022-01-10 20:24:36,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:24:36,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:24:36,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:24:36,796 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-10 20:24:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,823 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-01-10 20:24:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:24:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 14 [2022-01-10 20:24:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,824 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:24:36,824 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 20:24:36,825 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 [2022-01-10 20:24:36,825 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 20:24:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-01-10 20:24:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-01-10 20:24:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 20:24:36,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-01-10 20:24:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 20:24:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-10 20:24:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 20:24:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 20:24:36,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:36,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 20:24:36,829 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2063095621, now seen corresponding path program 1 times [2022-01-10 20:24:36,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846721290] [2022-01-10 20:24:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846721290] [2022-01-10 20:24:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846721290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:24:36,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:24:36,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:24:36,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606610090] [2022-01-10 20:24:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:24:36,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:24:36,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:24:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:24:36,887 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-01-10 20:24:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:36,907 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 20:24:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:24:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) Word has length 17 [2022-01-10 20:24:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:36,908 INFO L225 Difference]: With dead ends: 37 [2022-01-10 20:24:36,908 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 20:24:36,909 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 [2022-01-10 20:24:36,910 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:36,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:24:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 20:24:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-10 20:24:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-01-10 20:24:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-10 20:24:36,917 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 17 [2022-01-10 20:24:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:36,917 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-10 20:24:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-01-10 20:24:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-10 20:24:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 20:24:36,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:36,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:24:36,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 20:24:36,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2037137849, now seen corresponding path program 1 times [2022-01-10 20:24:36,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134023664] [2022-01-10 20:24:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:24:36,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:36,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134023664] [2022-01-10 20:24:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134023664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366320312] [2022-01-10 20:24:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:36,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:36,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:36,994 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) [2022-01-10 20:24:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 20:24:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 20:24:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 20:24:37,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:24:37,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366320312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:37,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:37,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-01-10 20:24:37,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465462594] [2022-01-10 20:24:37,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:37,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 20:24:37,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 20:24:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-10 20:24:37,249 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2022-01-10 20:24:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:37,409 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2022-01-10 20:24:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 20:24:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) Word has length 19 [2022-01-10 20:24:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:37,410 INFO L225 Difference]: With dead ends: 91 [2022-01-10 20:24:37,410 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 20:24:37,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-01-10 20:24:37,411 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:37,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 80 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 20:24:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-01-10 20:24:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 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) [2022-01-10 20:24:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-01-10 20:24:37,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 19 [2022-01-10 20:24:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-01-10 20:24:37,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2022-01-10 20:24:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-01-10 20:24:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 20:24:37,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:37,423 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 20:24:37,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:37,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:37,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash -201441722, now seen corresponding path program 2 times [2022-01-10 20:24:37,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:37,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56269837] [2022-01-10 20:24:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:37,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-01-10 20:24:37,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56269837] [2022-01-10 20:24:37,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56269837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141070001] [2022-01-10 20:24:37,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:24:37,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:37,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:37,722 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) [2022-01-10 20:24:37,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 20:24:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:24:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 20:24:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-10 20:24:38,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-10 20:24:38,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141070001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:38,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:38,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 11 [2022-01-10 20:24:38,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89830984] [2022-01-10 20:24:38,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:38,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 20:24:38,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:38,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 20:24:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 20:24:38,374 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2022-01-10 20:24:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:38,963 INFO L93 Difference]: Finished difference Result 350 states and 437 transitions. [2022-01-10 20:24:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 20:24:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) Word has length 69 [2022-01-10 20:24:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:38,965 INFO L225 Difference]: With dead ends: 350 [2022-01-10 20:24:38,965 INFO L226 Difference]: Without dead ends: 280 [2022-01-10 20:24:38,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2022-01-10 20:24:38,966 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 235 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:38,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 103 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-10 20:24:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 220. [2022-01-10 20:24:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.2100456621004567) internal successors, (265), 219 states have internal predecessors, (265), 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) [2022-01-10 20:24:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 265 transitions. [2022-01-10 20:24:39,008 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 265 transitions. Word has length 69 [2022-01-10 20:24:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:39,008 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 265 transitions. [2022-01-10 20:24:39,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2022-01-10 20:24:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 265 transitions. [2022-01-10 20:24:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 20:24:39,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:39,009 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 20:24:39,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-10 20:24:39,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1962841049, now seen corresponding path program 3 times [2022-01-10 20:24:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:39,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569393699] [2022-01-10 20:24:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:39,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 576 proven. 1 refuted. 0 times theorem prover too weak. 2307 trivial. 0 not checked. [2022-01-10 20:24:39,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569393699] [2022-01-10 20:24:39,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569393699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870048685] [2022-01-10 20:24:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:24:39,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:39,485 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) [2022-01-10 20:24:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 20:24:39,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 20:24:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 20:24:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 316 proven. 4 refuted. 0 times theorem prover too weak. 2564 trivial. 0 not checked. [2022-01-10 20:24:39,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 316 proven. 4 refuted. 0 times theorem prover too weak. 2564 trivial. 0 not checked. [2022-01-10 20:24:41,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870048685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:41,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:41,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12 [2022-01-10 20:24:41,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208921511] [2022-01-10 20:24:41,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:41,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 20:24:41,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 20:24:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 20:24:41,495 INFO L87 Difference]: Start difference. First operand 220 states and 265 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-01-10 20:24:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:43,238 INFO L93 Difference]: Finished difference Result 1245 states and 1645 transitions. [2022-01-10 20:24:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 20:24:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) Word has length 197 [2022-01-10 20:24:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:43,241 INFO L225 Difference]: With dead ends: 1245 [2022-01-10 20:24:43,241 INFO L226 Difference]: Without dead ends: 1030 [2022-01-10 20:24:43,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2022-01-10 20:24:43,243 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:43,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 53 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 20:24:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-10 20:24:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 710. [2022-01-10 20:24:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.1071932299012694) internal successors, (785), 709 states have internal predecessors, (785), 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) [2022-01-10 20:24:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 785 transitions. [2022-01-10 20:24:43,347 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 785 transitions. Word has length 197 [2022-01-10 20:24:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:43,347 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 785 transitions. [2022-01-10 20:24:43,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 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) [2022-01-10 20:24:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 785 transitions. [2022-01-10 20:24:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-01-10 20:24:43,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:43,354 INFO L514 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 18, 18, 18, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 20:24:43,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:43,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:43,576 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -976238412, now seen corresponding path program 4 times [2022-01-10 20:24:43,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527781991] [2022-01-10 20:24:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:43,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 57541 backedges. 11437 proven. 1 refuted. 0 times theorem prover too weak. 46103 trivial. 0 not checked. [2022-01-10 20:24:45,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527781991] [2022-01-10 20:24:45,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527781991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386245473] [2022-01-10 20:24:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 20:24:45,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:45,759 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) [2022-01-10 20:24:45,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 20:24:46,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 20:24:46,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:24:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 20:24:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:24:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57541 backedges. 5723 proven. 28568 refuted. 0 times theorem prover too weak. 23250 trivial. 0 not checked. [2022-01-10 20:24:47,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:24:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 57541 backedges. 11437 proven. 1 refuted. 0 times theorem prover too weak. 46103 trivial. 0 not checked. [2022-01-10 20:24:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386245473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:24:47,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:24:47,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 20:24:47,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089309209] [2022-01-10 20:24:47,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:24:47,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 20:24:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:24:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 20:24:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 20:24:47,730 INFO L87 Difference]: Start difference. First operand 710 states and 785 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 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) [2022-01-10 20:24:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:24:48,084 INFO L93 Difference]: Finished difference Result 1411 states and 1565 transitions. [2022-01-10 20:24:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 20:24:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 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) Word has length 638 [2022-01-10 20:24:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:24:48,088 INFO L225 Difference]: With dead ends: 1411 [2022-01-10 20:24:48,088 INFO L226 Difference]: Without dead ends: 1122 [2022-01-10 20:24:48,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 1271 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-01-10 20:24:48,089 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 193 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:24:48,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 166 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:24:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-10 20:24:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2022-01-10 20:24:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.104371097234612) internal successors, (1238), 1121 states have internal predecessors, (1238), 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) [2022-01-10 20:24:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1238 transitions. [2022-01-10 20:24:48,244 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1238 transitions. Word has length 638 [2022-01-10 20:24:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:24:48,244 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1238 transitions. [2022-01-10 20:24:48,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 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) [2022-01-10 20:24:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1238 transitions. [2022-01-10 20:24:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1122 [2022-01-10 20:24:48,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:24:48,284 INFO L514 BasicCegarLoop]: trace histogram [384, 384, 64, 64, 64, 32, 32, 32, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 20:24:48,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 20:24:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:48,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:24:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:24:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 325188722, now seen corresponding path program 5 times [2022-01-10 20:24:48,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:24:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267795314] [2022-01-10 20:24:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:24:48,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:24:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:24:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 182190 backedges. 11013 proven. 89 refuted. 0 times theorem prover too weak. 171088 trivial. 0 not checked. [2022-01-10 20:24:53,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:24:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267795314] [2022-01-10 20:24:53,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267795314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:24:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706558876] [2022-01-10 20:24:53,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 20:24:53,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:24:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:24:53,694 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) [2022-01-10 20:24:53,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 20:25:14,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-01-10 20:25:14,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:25:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 20:25:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:25:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 182190 backedges. 72774 proven. 440 refuted. 0 times theorem prover too weak. 108976 trivial. 0 not checked. [2022-01-10 20:25:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:25:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 182190 backedges. 70936 proven. 89 refuted. 0 times theorem prover too weak. 111165 trivial. 0 not checked. [2022-01-10 20:25:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706558876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:25:16,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:25:16,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 12 [2022-01-10 20:25:16,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519314095] [2022-01-10 20:25:16,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:25:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 20:25:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:25:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 20:25:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-10 20:25:16,923 INFO L87 Difference]: Start difference. First operand 1122 states and 1238 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 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) [2022-01-10 20:25:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:25:17,583 INFO L93 Difference]: Finished difference Result 3648 states and 4069 transitions. [2022-01-10 20:25:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 20:25:17,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 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) Word has length 1121 [2022-01-10 20:25:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:25:17,590 INFO L225 Difference]: With dead ends: 3648 [2022-01-10 20:25:17,590 INFO L226 Difference]: Without dead ends: 2562 [2022-01-10 20:25:17,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2234 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-01-10 20:25:17,593 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:25:17,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 80 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-10 20:25:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-01-10 20:25:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2562. [2022-01-10 20:25:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 1.0831706364701288) internal successors, (2774), 2561 states have internal predecessors, (2774), 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) [2022-01-10 20:25:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 2774 transitions. [2022-01-10 20:25:18,021 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 2774 transitions. Word has length 1121 [2022-01-10 20:25:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:25:18,022 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 2774 transitions. [2022-01-10 20:25:18,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 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) [2022-01-10 20:25:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 2774 transitions. [2022-01-10 20:25:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2562 [2022-01-10 20:25:18,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:25:18,055 INFO L514 BasicCegarLoop]: trace histogram [960, 960, 160, 160, 160, 32, 32, 32, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 20:25:18,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 20:25:18,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 20:25:18,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:25:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:25:18,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1525817970, now seen corresponding path program 6 times [2022-01-10 20:25:18,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:25:18,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765642654] [2022-01-10 20:25:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:25:18,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms