/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_LAZY.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:59:39,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:59:39,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:59:39,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:59:39,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:59:39,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:59:39,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:59:39,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:59:39,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:59:39,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:59:39,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:59:39,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:59:39,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:59:39,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:59:39,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:59:39,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:59:39,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:59:39,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:59:39,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:59:39,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:59:39,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:59:39,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:59:39,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:59:39,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:59:39,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:59:39,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:59:39,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:59:39,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:59:39,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:59:39,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:59:39,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:59:39,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:59:39,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:59:39,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:59:39,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:59:39,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:59:39,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:59:39,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:59:39,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:59:39,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:59:39,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:59:39,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:59:39,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:59:39,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:59:39,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:59:39,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:59:39,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:59:39,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:59:39,830 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:59:39,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:59:39,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:59:39,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:59:39,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:59:39,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:59:39,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:59:39,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:59:39,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:59:39,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:59:39,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:59:39,834 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:59:39,834 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:59:40,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:59:40,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:59:40,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:59:40,059 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:59:40,060 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:59:40,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:59:40,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c44bc4b8/86ef796a25754c129bd6f6f855ac7e25/FLAGb31331a58 [2022-01-10 18:59:40,502 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:59:40,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:59:40,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c44bc4b8/86ef796a25754c129bd6f6f855ac7e25/FLAGb31331a58 [2022-01-10 18:59:40,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c44bc4b8/86ef796a25754c129bd6f6f855ac7e25 [2022-01-10 18:59:40,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:59:40,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:59:40,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:59:40,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:59:40,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:59:40,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e25107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40, skipping insertion in model container [2022-01-10 18:59:40,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:59:40,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:59:40,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2022-01-10 18:59:40,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2022-01-10 18:59:40,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:59:40,805 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:59:40,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2022-01-10 18:59:40,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2022-01-10 18:59:40,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:59:40,862 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:59:40,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40 WrapperNode [2022-01-10 18:59:40,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:59:40,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:59:40,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:59:40,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:59:40,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,921 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 436 [2022-01-10 18:59:40,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:59:40,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:59:40,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:59:40,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:59:40,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:59:40,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:59:40,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:59:40,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:59:40,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (1/1) ... [2022-01-10 18:59:40,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:59:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:59:40,999 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 18:59:41,003 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 18:59:41,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:59:41,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:59:41,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:59:41,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:59:41,154 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:59:41,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:59:41,526 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:59:41,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:59:41,534 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:59:41,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:41 BoogieIcfgContainer [2022-01-10 18:59:41,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:59:41,536 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:59:41,537 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:59:41,538 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:59:41,540 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:41" (1/1) ... [2022-01-10 18:59:41,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:59:41 BasicIcfg [2022-01-10 18:59:41,836 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:59:41,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:59:41,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:59:41,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:59:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:59:40" (1/4) ... [2022-01-10 18:59:41,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd419bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:59:41, skipping insertion in model container [2022-01-10 18:59:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:59:40" (2/4) ... [2022-01-10 18:59:41,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd419bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:59:41, skipping insertion in model container [2022-01-10 18:59:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:59:41" (3/4) ... [2022-01-10 18:59:41,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd419bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:59:41, skipping insertion in model container [2022-01-10 18:59:41,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:59:41" (4/4) ... [2022-01-10 18:59:41,844 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.cTransformedIcfg [2022-01-10 18:59:41,848 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:59:41,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 18:59:41,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:59:41,895 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 18:59:41,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 18:59:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 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 18:59:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:59:41,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:41,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:59:41,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518683, now seen corresponding path program 1 times [2022-01-10 18:59:41,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:41,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798028002] [2022-01-10 18:59:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:41,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:42,363 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 18:59:42,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:42,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798028002] [2022-01-10 18:59:42,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798028002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:42,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:42,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:59:42,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991538286] [2022-01-10 18:59:42,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:42,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:59:42,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:59:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:59:42,388 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 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 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 18:59:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:42,868 INFO L93 Difference]: Finished difference Result 206 states and 333 transitions. [2022-01-10 18:59:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:59:42,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2022-01-10 18:59:42,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:42,877 INFO L225 Difference]: With dead ends: 206 [2022-01-10 18:59:42,877 INFO L226 Difference]: Without dead ends: 154 [2022-01-10 18:59:42,882 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 18:59:42,899 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 96 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:42,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 350 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:59:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-10 18:59:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-10 18:59:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 151 states have internal predecessors, (215), 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 18:59:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2022-01-10 18:59:43,000 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 47 [2022-01-10 18:59:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:43,000 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2022-01-10 18:59:43,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 18:59:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2022-01-10 18:59:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 18:59:43,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:43,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:59:43,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:59:43,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -281360002, now seen corresponding path program 1 times [2022-01-10 18:59:43,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:43,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709248004] [2022-01-10 18:59:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:43,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:43,143 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 18:59:43,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:43,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709248004] [2022-01-10 18:59:43,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709248004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:43,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:43,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:59:43,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427625640] [2022-01-10 18:59:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:59:43,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:59:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:59:43,151 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:59:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:43,324 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2022-01-10 18:59:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:59:43,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-01-10 18:59:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:43,331 INFO L225 Difference]: With dead ends: 280 [2022-01-10 18:59:43,331 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 18:59:43,332 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 18:59:43,333 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 75 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:43,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:59:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 18:59:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-01-10 18:59:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.450777202072539) internal successors, (280), 194 states have internal predecessors, (280), 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 18:59:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 280 transitions. [2022-01-10 18:59:43,370 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 280 transitions. Word has length 48 [2022-01-10 18:59:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 280 transitions. [2022-01-10 18:59:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 18:59:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 280 transitions. [2022-01-10 18:59:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 18:59:43,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:43,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:59:43,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:59:43,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1335203516, now seen corresponding path program 1 times [2022-01-10 18:59:43,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:43,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606573607] [2022-01-10 18:59:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:43,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:43,757 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 18:59:43,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606573607] [2022-01-10 18:59:43,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606573607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:43,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:43,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 18:59:43,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219150570] [2022-01-10 18:59:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:43,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:59:43,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:59:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:59:43,759 INFO L87 Difference]: Start difference. First operand 195 states and 280 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 18:59:46,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:50,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:52,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:54,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:59:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:59:55,432 INFO L93 Difference]: Finished difference Result 1332 states and 1998 transitions. [2022-01-10 18:59:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:59:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 49 [2022-01-10 18:59:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:59:55,436 INFO L225 Difference]: With dead ends: 1332 [2022-01-10 18:59:55,436 INFO L226 Difference]: Without dead ends: 1163 [2022-01-10 18:59:55,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:59:55,438 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 730 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:59:55,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1117 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 578 Invalid, 4 Unknown, 0 Unchecked, 11.1s Time] [2022-01-10 18:59:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-01-10 18:59:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 500. [2022-01-10 18:59:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 498 states have (on average 1.4839357429718876) internal successors, (739), 499 states have internal predecessors, (739), 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 18:59:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 739 transitions. [2022-01-10 18:59:55,574 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 739 transitions. Word has length 49 [2022-01-10 18:59:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:59:55,575 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 739 transitions. [2022-01-10 18:59:55,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 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 18:59:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 739 transitions. [2022-01-10 18:59:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 18:59:55,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:59:55,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:59:55,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:59:55,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:59:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:59:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1436670939, now seen corresponding path program 1 times [2022-01-10 18:59:55,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:59:55,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732084757] [2022-01-10 18:59:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:59:55,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:59:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:59:55,906 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 18:59:55,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:59:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732084757] [2022-01-10 18:59:55,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732084757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:59:55,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:59:55,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:59:55,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581849010] [2022-01-10 18:59:55,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:59:55,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:59:55,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:59:55,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:59:55,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:59:55,908 INFO L87 Difference]: Start difference. First operand 500 states and 739 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 18:59:58,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:01,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:04,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:06,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:08,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:10,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:14,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:15,780 INFO L93 Difference]: Finished difference Result 2900 states and 4391 transitions. [2022-01-10 19:00:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 19:00:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 50 [2022-01-10 19:00:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:15,790 INFO L225 Difference]: With dead ends: 2900 [2022-01-10 19:00:15,790 INFO L226 Difference]: Without dead ends: 2478 [2022-01-10 19:00:15,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-01-10 19:00:15,798 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 697 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 14 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:15,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1058 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 555 Invalid, 7 Unknown, 0 Unchecked, 18.5s Time] [2022-01-10 19:00:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2022-01-10 19:00:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 913. [2022-01-10 19:00:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 911 states have (on average 1.4840834248079033) internal successors, (1352), 912 states have internal predecessors, (1352), 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 19:00:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1352 transitions. [2022-01-10 19:00:16,212 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1352 transitions. Word has length 50 [2022-01-10 19:00:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:16,212 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1352 transitions. [2022-01-10 19:00:16,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 19:00:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1352 transitions. [2022-01-10 19:00:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 19:00:16,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:16,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:00:16,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 19:00:16,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash -977616102, now seen corresponding path program 1 times [2022-01-10 19:00:16,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908627611] [2022-01-10 19:00:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:16,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:16,657 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 19:00:16,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908627611] [2022-01-10 19:00:16,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908627611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:16,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:16,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 19:00:16,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549501651] [2022-01-10 19:00:16,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:16,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 19:00:16,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 19:00:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 19:00:16,659 INFO L87 Difference]: Start difference. First operand 913 states and 1352 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 19:00:19,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:24,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:26,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:28,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:30,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:34,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:34,742 INFO L93 Difference]: Finished difference Result 3743 states and 5637 transitions. [2022-01-10 19:00:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 19:00:34,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 50 [2022-01-10 19:00:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:34,769 INFO L225 Difference]: With dead ends: 3743 [2022-01-10 19:00:34,769 INFO L226 Difference]: Without dead ends: 3213 [2022-01-10 19:00:34,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-10 19:00:34,771 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 596 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 16 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:34,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1376 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 747 Invalid, 6 Unknown, 0 Unchecked, 15.9s Time] [2022-01-10 19:00:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2022-01-10 19:00:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 1186. [2022-01-10 19:00:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1184 states have (on average 1.4890202702702702) internal successors, (1763), 1185 states have internal predecessors, (1763), 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 19:00:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1763 transitions. [2022-01-10 19:00:35,339 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1763 transitions. Word has length 50 [2022-01-10 19:00:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:35,344 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1763 transitions. [2022-01-10 19:00:35,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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 19:00:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1763 transitions. [2022-01-10 19:00:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:35,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:35,346 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, 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 19:00:35,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 19:00:35,346 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -948853917, now seen corresponding path program 1 times [2022-01-10 19:00:35,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097937508] [2022-01-10 19:00:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:35,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:35,613 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 19:00:35,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:35,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097937508] [2022-01-10 19:00:35,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097937508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:35,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:35,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:00:35,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12034001] [2022-01-10 19:00:35,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:35,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:00:35,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:00:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:00:35,615 INFO L87 Difference]: Start difference. First operand 1186 states and 1763 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:37,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:38,597 INFO L93 Difference]: Finished difference Result 1680 states and 2501 transitions. [2022-01-10 19:00:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:00:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 19:00:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:38,601 INFO L225 Difference]: With dead ends: 1680 [2022-01-10 19:00:38,602 INFO L226 Difference]: Without dead ends: 881 [2022-01-10 19:00:38,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 19:00:38,604 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 504 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:38,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 146 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 19:00:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-10 19:00:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 872. [2022-01-10 19:00:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 870 states have (on average 1.4816091954022987) internal successors, (1289), 871 states have internal predecessors, (1289), 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 19:00:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1289 transitions. [2022-01-10 19:00:39,051 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1289 transitions. Word has length 51 [2022-01-10 19:00:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:39,051 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1289 transitions. [2022-01-10 19:00:39,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1289 transitions. [2022-01-10 19:00:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:39,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:39,052 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, 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 19:00:39,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 19:00:39,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1393106052, now seen corresponding path program 1 times [2022-01-10 19:00:39,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:39,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252617816] [2022-01-10 19:00:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:39,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:39,325 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 19:00:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252617816] [2022-01-10 19:00:39,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252617816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:39,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:39,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:00:39,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38841153] [2022-01-10 19:00:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:39,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:00:39,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:39,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:00:39,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:00:39,326 INFO L87 Difference]: Start difference. First operand 872 states and 1289 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:41,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:42,206 INFO L93 Difference]: Finished difference Result 1376 states and 2043 transitions. [2022-01-10 19:00:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:00:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 19:00:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:42,209 INFO L225 Difference]: With dead ends: 1376 [2022-01-10 19:00:42,209 INFO L226 Difference]: Without dead ends: 588 [2022-01-10 19:00:42,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 19:00:42,212 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 529 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 142 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 19:00:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-10 19:00:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 580. [2022-01-10 19:00:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.4740484429065743) internal successors, (852), 579 states have internal predecessors, (852), 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 19:00:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 852 transitions. [2022-01-10 19:00:42,535 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 852 transitions. Word has length 51 [2022-01-10 19:00:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:42,535 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 852 transitions. [2022-01-10 19:00:42,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 852 transitions. [2022-01-10 19:00:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:42,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:42,535 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, 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 19:00:42,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 19:00:42,536 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -435348187, now seen corresponding path program 1 times [2022-01-10 19:00:42,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:42,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416842353] [2022-01-10 19:00:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:42,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:42,803 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 19:00:42,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:42,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416842353] [2022-01-10 19:00:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416842353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:42,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:42,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 19:00:42,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484665315] [2022-01-10 19:00:42,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 19:00:42,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 19:00:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 19:00:42,805 INFO L87 Difference]: Start difference. First operand 580 states and 852 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:45,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:46,781 INFO L93 Difference]: Finished difference Result 2157 states and 3211 transitions. [2022-01-10 19:00:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 19:00:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 19:00:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:46,787 INFO L225 Difference]: With dead ends: 2157 [2022-01-10 19:00:46,787 INFO L226 Difference]: Without dead ends: 1649 [2022-01-10 19:00:46,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 19:00:46,788 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 242 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:46,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 495 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 367 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 19:00:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-01-10 19:00:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 599. [2022-01-10 19:00:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 597 states have (on average 1.4623115577889447) internal successors, (873), 598 states have internal predecessors, (873), 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 19:00:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 873 transitions. [2022-01-10 19:00:47,213 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 873 transitions. Word has length 51 [2022-01-10 19:00:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:47,214 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 873 transitions. [2022-01-10 19:00:47,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 873 transitions. [2022-01-10 19:00:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 19:00:47,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:47,215 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, 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 19:00:47,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 19:00:47,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash -993417369, now seen corresponding path program 1 times [2022-01-10 19:00:47,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:47,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878291672] [2022-01-10 19:00:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:47,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:47,598 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 19:00:47,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:47,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878291672] [2022-01-10 19:00:47,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878291672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:47,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:47,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 19:00:47,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152284661] [2022-01-10 19:00:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:47,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 19:00:47,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 19:00:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-10 19:00:47,599 INFO L87 Difference]: Start difference. First operand 599 states and 873 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:50,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 19:00:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:00:51,931 INFO L93 Difference]: Finished difference Result 1343 states and 1992 transitions. [2022-01-10 19:00:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 19:00:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 19:00:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:00:51,934 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 19:00:51,934 INFO L226 Difference]: Without dead ends: 818 [2022-01-10 19:00:51,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-10 19:00:51,936 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 270 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-10 19:00:51,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 665 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-01-10 19:00:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-10 19:00:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 599. [2022-01-10 19:00:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 597 states have (on average 1.4589614740368508) internal successors, (871), 598 states have internal predecessors, (871), 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 19:00:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 871 transitions. [2022-01-10 19:00:52,363 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 871 transitions. Word has length 51 [2022-01-10 19:00:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:00:52,363 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 871 transitions. [2022-01-10 19:00:52,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:00:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 871 transitions. [2022-01-10 19:00:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 19:00:52,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:00:52,364 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, 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 19:00:52,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 19:00:52,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 19:00:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:00:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 456279548, now seen corresponding path program 1 times [2022-01-10 19:00:52,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:00:52,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669672971] [2022-01-10 19:00:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:00:52,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:00:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:00:52,984 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 19:00:52,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:00:52,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669672971] [2022-01-10 19:00:52,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669672971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:00:52,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:00:52,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-10 19:00:52,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306073325] [2022-01-10 19:00:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:00:52,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 19:00:52,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:00:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 19:00:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-01-10 19:00:52,986 INFO L87 Difference]: Start difference. First operand 599 states and 871 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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)