/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/array-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:26:08,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:26:08,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:26:08,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 09:26:08,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:26:08,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:26:08,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:26:08,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:26:08,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:26:08,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:26:08,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:26:08,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:26:08,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:26:08,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:26:08,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:26:08,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:26:08,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 09:26:08,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 09:26:08,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 09:26:08,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 09:26:08,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 09:26:08,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 09:26:08,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 09:26:08,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 09:26:08,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 09:26:08,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 09:26:08,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 09:26:08,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 09:26:08,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 09:26:08,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 09:26:08,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:26:08,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:26:08,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:26:08,655 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 09:26:08,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:26:08,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:26:08,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:26:08,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:26:08,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:26:08,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:26:08,681 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:26:08,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:26:08,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:26:08,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:26:08,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:26:08,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:26:08,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:26:08,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:26:08,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:26:08,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:26:08,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:26:08,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:26:08,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:26:08,686 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:26:08,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:26:08,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:26:08,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:26:08,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:26:08,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:26:08,908 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:26:08,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-10 09:26:08,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0194123a/bbc35dc89dd84a6f9e51d0761aae9947/FLAG4263fb674 [2022-01-10 09:26:09,340 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:26:09,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2022-01-10 09:26:09,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0194123a/bbc35dc89dd84a6f9e51d0761aae9947/FLAG4263fb674 [2022-01-10 09:26:09,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0194123a/bbc35dc89dd84a6f9e51d0761aae9947 [2022-01-10 09:26:09,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:26:09,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:26:09,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:26:09,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:26:09,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:26:09,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190515c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09, skipping insertion in model container [2022-01-10 09:26:09,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:26:09,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:26:09,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i[816,829] [2022-01-10 09:26:09,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:26:09,539 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:26:09,547 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i[816,829] [2022-01-10 09:26:09,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:26:09,562 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:26:09,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09 WrapperNode [2022-01-10 09:26:09,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:26:09,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:26:09,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:26:09,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:26:09,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,593 INFO L137 Inliner]: procedures = 18, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 129 [2022-01-10 09:26:09,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:26:09,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:26:09,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:26:09,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:26:09,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:26:09,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:26:09,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:26:09,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:26:09,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:26:09,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:09,663 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 09:26:09,684 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 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:26:09,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:26:09,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:26:09,749 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:26:09,750 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:26:09,897 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:26:09,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:26:09,901 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-10 09:26:09,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:09 BoogieIcfgContainer [2022-01-10 09:26:09,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:26:09,903 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:26:09,903 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:26:09,904 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:26:09,906 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:09" (1/1) ... [2022-01-10 09:26:09,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:09 BasicIcfg [2022-01-10 09:26:09,993 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:26:09,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:26:09,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:26:09,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:26:09,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:26:09" (1/4) ... [2022-01-10 09:26:09,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e51e280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:09, skipping insertion in model container [2022-01-10 09:26:09,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:09" (2/4) ... [2022-01-10 09:26:09,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e51e280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:09, skipping insertion in model container [2022-01-10 09:26:09,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:09" (3/4) ... [2022-01-10 09:26:09,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e51e280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:26:09, skipping insertion in model container [2022-01-10 09:26:09,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:09" (4/4) ... [2022-01-10 09:26:09,997 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.iTransformedIcfg [2022-01-10 09:26:10,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:26:10,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:26:10,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:26:10,030 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 09:26:10,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:26:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 09:26:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 09:26:10,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:10,041 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 09:26:10,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -533169757, now seen corresponding path program 1 times [2022-01-10 09:26:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:10,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060942261] [2022-01-10 09:26:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:10,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:10,260 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 09:26:10,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:10,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060942261] [2022-01-10 09:26:10,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060942261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:10,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:10,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:26:10,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869265805] [2022-01-10 09:26:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:10,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:26:10,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:26:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:26:10,293 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 8.5) internal successors, (17), 2 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 09:26:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:10,309 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-01-10 09:26:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:26:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 09:26:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:10,316 INFO L225 Difference]: With dead ends: 56 [2022-01-10 09:26:10,316 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 09:26:10,318 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 09:26:10,322 INFO L933 BasicCegarLoop]: 36 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, 36 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 09:26:10,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:26:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 09:26:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-10 09:26:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 09:26:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 09:26:10,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2022-01-10 09:26:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:10,350 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 09:26:10,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 09:26:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 09:26:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 09:26:10,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:10,351 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 09:26:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:26:10,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2034999575, now seen corresponding path program 1 times [2022-01-10 09:26:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:10,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552704710] [2022-01-10 09:26:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:10,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:10,463 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 09:26:10,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552704710] [2022-01-10 09:26:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552704710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:10,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:10,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:26:10,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783249040] [2022-01-10 09:26:10,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:10,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:26:10,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:26:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:26:10,466 INFO L87 Difference]: Start difference. First operand 26 states and 32 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 09:26:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:10,478 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-01-10 09:26:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:26:10,479 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 09:26:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:10,479 INFO L225 Difference]: With dead ends: 50 [2022-01-10 09:26:10,480 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 09:26:10,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:26:10,481 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:10,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:26:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 09:26:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-10 09:26:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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 09:26:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-01-10 09:26:10,485 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-01-10 09:26:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:10,485 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-01-10 09:26:10,486 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 09:26:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-01-10 09:26:10,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 09:26:10,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:10,486 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 09:26:10,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:26:10,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash 934100071, now seen corresponding path program 1 times [2022-01-10 09:26:10,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:10,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345514035] [2022-01-10 09:26:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:10,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:10,598 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 09:26:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345514035] [2022-01-10 09:26:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345514035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:26:10,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:26:10,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:26:10,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219519286] [2022-01-10 09:26:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:26:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:26:10,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:26:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:26:10,600 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 09:26:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:10,688 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-10 09:26:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:26:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2022-01-10 09:26:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:10,689 INFO L225 Difference]: With dead ends: 56 [2022-01-10 09:26:10,689 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 09:26:10,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:26:10,690 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:10,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:26:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 09:26:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-10 09:26:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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 09:26:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-10 09:26:10,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-01-10 09:26:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:10,695 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-10 09:26:10,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 09:26:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-10 09:26:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 09:26:10,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:10,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:10,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:26:10,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1066940925, now seen corresponding path program 1 times [2022-01-10 09:26:10,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:10,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93964920] [2022-01-10 09:26:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:10,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 09:26:10,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93964920] [2022-01-10 09:26:10,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93964920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670245713] [2022-01-10 09:26:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:10,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:10,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:10,857 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 09:26:10,872 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 09:26:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 09:26:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 09:26:11,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 09:26:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670245713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:11,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:11,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 09:26:11,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035642957] [2022-01-10 09:26:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:11,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 09:26:11,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 09:26:11,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 09:26:11,328 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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 09:26:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:11,542 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-01-10 09:26:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 09:26:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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 29 [2022-01-10 09:26:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:11,543 INFO L225 Difference]: With dead ends: 65 [2022-01-10 09:26:11,543 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 09:26:11,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 09:26:11,544 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:11,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 114 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:26:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 09:26:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 09:26:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 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 09:26:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-10 09:26:11,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2022-01-10 09:26:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:11,549 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-10 09:26:11,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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 09:26:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-10 09:26:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 09:26:11,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:11,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:11,580 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 09:26:11,780 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 09:26:11,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash 445994231, now seen corresponding path program 2 times [2022-01-10 09:26:11,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334448504] [2022-01-10 09:26:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:11,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 09:26:11,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:11,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334448504] [2022-01-10 09:26:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334448504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:11,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936345882] [2022-01-10 09:26:11,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:26:11,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:11,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:11,963 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 09:26:11,964 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 09:26:12,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:26:12,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:12,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 09:26:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 09:26:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 09:26:12,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936345882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:12,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:12,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 09:26:12,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493585940] [2022-01-10 09:26:12,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:12,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 09:26:12,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 09:26:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 09:26:12,375 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 09:26:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:26:12,690 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2022-01-10 09:26:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 09:26:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 35 [2022-01-10 09:26:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:26:12,691 INFO L225 Difference]: With dead ends: 91 [2022-01-10 09:26:12,691 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 09:26:12,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 09:26:12,692 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 09:26:12,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 92 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 09:26:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 09:26:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-10 09:26:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 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 09:26:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-01-10 09:26:12,700 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 35 [2022-01-10 09:26:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:26:12,700 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-01-10 09:26:12,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 09:26:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-01-10 09:26:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 09:26:12,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:26:12,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:26:12,708 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 09:26:12,906 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 09:26:12,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:26:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:26:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1426982713, now seen corresponding path program 3 times [2022-01-10 09:26:12,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:26:12,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770061427] [2022-01-10 09:26:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:26:12,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:26:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:26:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 09:26:13,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:26:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770061427] [2022-01-10 09:26:13,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770061427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:26:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009249185] [2022-01-10 09:26:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:26:13,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:26:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:26:13,181 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 09:26:13,198 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 09:26:21,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 09:26:21,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:26:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-10 09:26:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:26:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-10 09:26:41,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:26:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-10 09:26:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009249185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:26:45,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:26:45,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 18 [2022-01-10 09:26:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245219997] [2022-01-10 09:26:45,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:26:45,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 09:26:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:26:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 09:26:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=253, Unknown=10, NotChecked=0, Total=306 [2022-01-10 09:26:45,265 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 09:26:57,266 WARN L228 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 44 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:27:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:27:17,415 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2022-01-10 09:27:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 09:27:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 65 [2022-01-10 09:27:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:27:17,416 INFO L225 Difference]: With dead ends: 137 [2022-01-10 09:27:17,416 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 09:27:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=77, Invalid=417, Unknown=12, NotChecked=0, Total=506 [2022-01-10 09:27:17,417 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-01-10 09:27:17,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 150 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 209 Invalid, 0 Unknown, 22 Unchecked, 6.3s Time] [2022-01-10 09:27:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 09:27:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-10 09:27:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 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 09:27:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-01-10 09:27:17,425 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 65 [2022-01-10 09:27:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:27:17,426 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-01-10 09:27:17,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 09:27:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-01-10 09:27:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 09:27:17,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:27:17,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:27:17,442 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 09:27:17,642 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 09:27:17,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:27:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:27:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash 212339277, now seen corresponding path program 4 times [2022-01-10 09:27:17,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:27:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477929288] [2022-01-10 09:27:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:27:17,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:27:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:27:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-01-10 09:27:18,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:27:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477929288] [2022-01-10 09:27:18,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477929288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:27:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669129331] [2022-01-10 09:27:18,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 09:27:18,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:27:18,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:27:18,018 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 09:27:18,022 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 09:27:18,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 09:27:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:27:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 09:27:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates...