/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_BITWISE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:40:02,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:40:02,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:40:02,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:40:02,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:40:02,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:40:02,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:40:02,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:40:02,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:40:02,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:40:02,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:40:02,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:40:02,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:40:02,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:40:02,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:40:02,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:40:02,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:40:02,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:40:02,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:40:02,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:40:02,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:40:02,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:40:02,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:40:02,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:40:02,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:40:02,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:40:02,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:40:02,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:40:02,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:40:02,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:40:02,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:40:02,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:40:02,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:40:02,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:40:02,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:40:02,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:40:02,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:40:02,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:40:02,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:40:02,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:40:02,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:40:02,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 08:40:02,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:40:02,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:40:02,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:40:02,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:40:02,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:40:02,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:40:02,823 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:40:02,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:40:02,824 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:40:02,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:40:02,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:40:02,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 08:40:02,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:40:02,829 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 08:40:02,830 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:40:03,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:40:03,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:40:03,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:40:03,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:40:03,043 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:40:03,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-10 08:40:03,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9328d9f98/258322751bd44ffcbe6afd4f4f65ae3c/FLAG5549fadf6 [2022-01-10 08:40:03,445 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:40:03,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-01-10 08:40:03,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9328d9f98/258322751bd44ffcbe6afd4f4f65ae3c/FLAG5549fadf6 [2022-01-10 08:40:03,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9328d9f98/258322751bd44ffcbe6afd4f4f65ae3c [2022-01-10 08:40:03,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:40:03,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 08:40:03,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:40:03,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:40:03,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:40:03,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bdf255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03, skipping insertion in model container [2022-01-10 08:40:03,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:40:03,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:40:03,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-01-10 08:40:03,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:40:03,638 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:40:03,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-01-10 08:40:03,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:40:03,666 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:40:03,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03 WrapperNode [2022-01-10 08:40:03,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:40:03,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:40:03,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:40:03,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:40:03,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,702 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-01-10 08:40:03,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:40:03,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:40:03,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:40:03,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:40:03,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:40:03,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:40:03,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:40:03,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:40:03,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:40:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:03,739 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 08:40:03,743 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 08:40:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:40:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:40:03,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:40:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:40:03,813 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:40:03,814 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:40:03,897 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:40:03,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:40:03,915 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 08:40:03,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:40:03 BoogieIcfgContainer [2022-01-10 08:40:03,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:40:03,917 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 08:40:03,917 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 08:40:03,919 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 08:40:03,922 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:40:03" (1/1) ... [2022-01-10 08:40:03,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:40:03 BasicIcfg [2022-01-10 08:40:03,979 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 08:40:03,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:40:03,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:40:03,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:40:03,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:40:03" (1/4) ... [2022-01-10 08:40:03,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1477c034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:40:03, skipping insertion in model container [2022-01-10 08:40:03,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:40:03" (2/4) ... [2022-01-10 08:40:03,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1477c034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:40:03, skipping insertion in model container [2022-01-10 08:40:03,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:40:03" (3/4) ... [2022-01-10 08:40:03,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1477c034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:40:03, skipping insertion in model container [2022-01-10 08:40:03,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:40:03" (4/4) ... [2022-01-10 08:40:03,998 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.cTransformedIcfg [2022-01-10 08:40:04,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:40:04,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 08:40:04,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:40:04,047 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 08:40:04,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 08:40:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 08:40:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 08:40:04,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:04,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 08:40:04,059 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:04,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1953496264, now seen corresponding path program 1 times [2022-01-10 08:40:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:04,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868768453] [2022-01-10 08:40:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:04,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:04,225 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 08:40:04,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:04,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868768453] [2022-01-10 08:40:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868768453] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:40:04,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:40:04,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:40:04,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970440289] [2022-01-10 08:40:04,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:40:04,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:40:04,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:40:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:40:04,273 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 08:40:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:04,285 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-01-10 08:40:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:40:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-01-10 08:40:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:04,296 INFO L225 Difference]: With dead ends: 21 [2022-01-10 08:40:04,296 INFO L226 Difference]: Without dead ends: 9 [2022-01-10 08:40:04,299 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 08:40:04,303 INFO L933 BasicCegarLoop]: 14 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, 14 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 08:40:04,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:40:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-10 08:40:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-10 08:40:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 08:40:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-01-10 08:40:04,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-01-10 08:40:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:04,339 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-01-10 08:40:04,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 08:40:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-01-10 08:40:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 08:40:04,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:04,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 08:40:04,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 08:40:04,341 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1953526055, now seen corresponding path program 1 times [2022-01-10 08:40:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507427161] [2022-01-10 08:40:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:04,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:04,464 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 08:40:04,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507427161] [2022-01-10 08:40:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507427161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:40:04,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:40:04,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:40:04,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366947356] [2022-01-10 08:40:04,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:40:04,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:40:04,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:04,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:40:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:40:04,467 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 08:40:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:04,494 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-01-10 08:40:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:40:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-01-10 08:40:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:04,495 INFO L225 Difference]: With dead ends: 19 [2022-01-10 08:40:04,495 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 08:40:04,496 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 08:40:04,497 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:04,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:40:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 08:40:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-01-10 08:40:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 08:40:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-10 08:40:04,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-01-10 08:40:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:04,501 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-10 08:40:04,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 08:40:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-10 08:40:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 08:40:04,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:04,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:04,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 08:40:04,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1634255214, now seen corresponding path program 1 times [2022-01-10 08:40:04,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357671291] [2022-01-10 08:40:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:04,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 08:40:04,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357671291] [2022-01-10 08:40:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357671291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:40:04,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:40:04,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:40:04,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903503433] [2022-01-10 08:40:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:40:04,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:40:04,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:40:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:40:04,595 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 08:40:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:04,650 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-01-10 08:40:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:40:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-01-10 08:40:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:04,651 INFO L225 Difference]: With dead ends: 18 [2022-01-10 08:40:04,651 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 08:40:04,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:40:04,653 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:04,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:40:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 08:40:04,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 08:40:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 08:40:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 08:40:04,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-10 08:40:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:04,658 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 08:40:04,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 08:40:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 08:40:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 08:40:04,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:04,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:04,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 08:40:04,659 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -734404824, now seen corresponding path program 1 times [2022-01-10 08:40:04,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:04,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567141312] [2022-01-10 08:40:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:04,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:40:04,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:04,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567141312] [2022-01-10 08:40:04,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567141312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:40:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794633966] [2022-01-10 08:40:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:04,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:04,743 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 08:40:04,760 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 08:40:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 08:40:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:40:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:40:04,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:40:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:40:05,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794633966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:40:05,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:40:05,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-10 08:40:05,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031679848] [2022-01-10 08:40:05,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:40:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 08:40:05,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 08:40:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-10 08:40:05,077 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 08:40:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:05,319 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-10 08:40:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 08:40:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 12 [2022-01-10 08:40:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:05,321 INFO L225 Difference]: With dead ends: 43 [2022-01-10 08:40:05,322 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 08:40:05,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-01-10 08:40:05,330 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:40:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 08:40:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-01-10 08:40:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 08:40:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-10 08:40:05,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2022-01-10 08:40:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-10 08:40:05,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 08:40:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-10 08:40:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 08:40:05,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:05,345 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:05,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 08:40:05,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:05,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:05,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1482127929, now seen corresponding path program 2 times [2022-01-10 08:40:05,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:05,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191953456] [2022-01-10 08:40:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:05,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:40:05,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191953456] [2022-01-10 08:40:05,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191953456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:40:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498823634] [2022-01-10 08:40:05,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:40:05,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:05,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:05,660 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 08:40:05,661 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 08:40:05,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:40:05,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:40:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 08:40:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:40:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:40:10,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:40:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 08:40:10,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498823634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:40:10,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:40:10,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2022-01-10 08:40:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217596064] [2022-01-10 08:40:10,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:40:10,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 08:40:10,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 08:40:10,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=122, Unknown=1, NotChecked=0, Total=182 [2022-01-10 08:40:10,746 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 08:40:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:11,011 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-01-10 08:40:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 08:40:11,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 24 [2022-01-10 08:40:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:11,012 INFO L225 Difference]: With dead ends: 57 [2022-01-10 08:40:11,012 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 08:40:11,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2022-01-10 08:40:11,013 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:11,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-10 08:40:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 08:40:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-01-10 08:40:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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 08:40:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-10 08:40:11,019 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-01-10 08:40:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-10 08:40:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 08:40:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-10 08:40:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 08:40:11,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:11,021 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:11,048 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 08:40:11,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:11,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1296830382, now seen corresponding path program 3 times [2022-01-10 08:40:11,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:11,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376743669] [2022-01-10 08:40:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:11,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 62 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:40:11,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376743669] [2022-01-10 08:40:11,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376743669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:40:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799612611] [2022-01-10 08:40:11,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 08:40:11,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:11,392 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 08:40:11,426 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 08:40:11,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 08:40:11,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:40:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 08:40:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:40:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 08:40:11,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:40:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 08:40:12,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799612611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:40:12,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:40:12,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-10 08:40:12,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847158943] [2022-01-10 08:40:12,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:40:12,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 08:40:12,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 08:40:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-10 08:40:12,019 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 08:40:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:13,391 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-01-10 08:40:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 08:40:13,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 33 [2022-01-10 08:40:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:13,392 INFO L225 Difference]: With dead ends: 91 [2022-01-10 08:40:13,392 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 08:40:13,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 08:40:13,394 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:13,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 101 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:40:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 08:40:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-01-10 08:40:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 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 08:40:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-01-10 08:40:13,402 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 33 [2022-01-10 08:40:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:13,403 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-01-10 08:40:13,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 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 08:40:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-01-10 08:40:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 08:40:13,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:13,404 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:13,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 08:40:13,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:13,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2117685255, now seen corresponding path program 4 times [2022-01-10 08:40:13,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515107464] [2022-01-10 08:40:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:13,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 193 proven. 57 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 08:40:13,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515107464] [2022-01-10 08:40:13,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515107464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:40:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668505963] [2022-01-10 08:40:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 08:40:13,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:13,778 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 08:40:13,780 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 08:40:13,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 08:40:13,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:40:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 08:40:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:40:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 08:40:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:40:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 08:40:15,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668505963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:40:15,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:40:15,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 34 [2022-01-10 08:40:15,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297283250] [2022-01-10 08:40:15,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:40:15,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 08:40:15,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:40:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 08:40:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 08:40:15,081 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 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 08:40:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:40:29,075 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2022-01-10 08:40:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-10 08:40:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 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 54 [2022-01-10 08:40:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:40:29,080 INFO L225 Difference]: With dead ends: 166 [2022-01-10 08:40:29,080 INFO L226 Difference]: Without dead ends: 108 [2022-01-10 08:40:29,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1701, Invalid=5609, Unknown=0, NotChecked=0, Total=7310 [2022-01-10 08:40:29,085 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 402 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:40:29,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 341 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 08:40:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-10 08:40:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-01-10 08:40:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 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 08:40:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2022-01-10 08:40:29,096 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 54 [2022-01-10 08:40:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:40:29,096 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2022-01-10 08:40:29,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 34 states have internal predecessors, (100), 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 08:40:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2022-01-10 08:40:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 08:40:29,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:40:29,098 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 7, 1, 1, 1, 1, 1, 1] [2022-01-10 08:40:29,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 08:40:29,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:29,315 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:40:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:40:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1335670578, now seen corresponding path program 5 times [2022-01-10 08:40:29,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:40:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434706836] [2022-01-10 08:40:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:40:29,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:40:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:40:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 498 proven. 77 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-10 08:40:29,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:40:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434706836] [2022-01-10 08:40:29,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434706836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:40:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522691098] [2022-01-10 08:40:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 08:40:29,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:40:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:40:29,541 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 08:40:29,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process