/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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:58:22,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:58:22,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:58:22,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:58:22,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:58:22,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:58:22,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:58:22,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:58:22,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:58:22,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:58:22,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:58:22,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:58:22,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:58:22,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:58:22,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:58:22,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:58:22,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:58:22,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:58:22,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:58:22,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:58:22,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:58:22,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:58:22,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:58:22,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:58:22,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:58:22,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:58:22,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:58:22,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:58:22,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:58:22,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:58:22,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:58:22,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:58:22,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:58:22,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:58:22,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:58:22,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:58:22,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:58:22,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:58:22,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:58:22,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:58:22,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:58:22,455 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 18:58:22,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:58:22,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:58:22,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:58:22,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:58:22,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:58:22,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:58:22,481 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:58:22,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:58:22,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:58:22,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:58:22,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:58:22,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:58:22,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:58:22,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:58:22,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:58:22,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:58:22,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:58:22,485 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:58:22,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:58:22,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:58:22,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:58:22,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:58:22,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:58:22,652 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:58:22,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 18:58:22,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bc74dca/5ee48e1edced4c2dac22be3c9cd7932f/FLAG3e8bdce29 [2022-01-10 18:58:23,076 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:58:23,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-01-10 18:58:23,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bc74dca/5ee48e1edced4c2dac22be3c9cd7932f/FLAG3e8bdce29 [2022-01-10 18:58:23,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bc74dca/5ee48e1edced4c2dac22be3c9cd7932f [2022-01-10 18:58:23,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:58:23,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:58:23,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:58:23,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:58:23,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:58:23,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270e7a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23, skipping insertion in model container [2022-01-10 18:58:23,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:58:23,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:58:23,685 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2022-01-10 18:58:23,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:58:23,703 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:58:23,725 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.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4069,4082] [2022-01-10 18:58:23,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:58:23,741 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:58:23,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23 WrapperNode [2022-01-10 18:58:23,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:58:23,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:58:23,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:58:23,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:58:23,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,769 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 261 [2022-01-10 18:58:23,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:58:23,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:58:23,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:58:23,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:58:23,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:58:23,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:58:23,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:58:23,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:58:23,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (1/1) ... [2022-01-10 18:58:23,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:58:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:58:23,833 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 18:58:23,888 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 18:58:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:58:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:58:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:58:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:58:23,966 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:58:23,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:58:24,234 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:58:24,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:58:24,239 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:58:24,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:58:24 BoogieIcfgContainer [2022-01-10 18:58:24,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:58:24,241 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:58:24,241 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:58:24,242 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:58:24,244 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:58:24" (1/1) ... [2022-01-10 18:58:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:58:24 BasicIcfg [2022-01-10 18:58:24,527 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:58:24,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:58:24,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:58:24,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:58:24,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:58:23" (1/4) ... [2022-01-10 18:58:24,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706e0094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:58:24, skipping insertion in model container [2022-01-10 18:58:24,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:58:23" (2/4) ... [2022-01-10 18:58:24,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706e0094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:58:24, skipping insertion in model container [2022-01-10 18:58:24,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:58:24" (3/4) ... [2022-01-10 18:58:24,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706e0094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:58:24, skipping insertion in model container [2022-01-10 18:58:24,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:58:24" (4/4) ... [2022-01-10 18:58:24,535 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.cTransformedIcfg [2022-01-10 18:58:24,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:58:24,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:58:24,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:58:24,588 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 18:58:24,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:58:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 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 18:58:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 18:58:24,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:24,605 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] [2022-01-10 18:58:24,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 353872791, now seen corresponding path program 1 times [2022-01-10 18:58:24,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968570481] [2022-01-10 18:58:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:24,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:24,972 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 18:58:24,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968570481] [2022-01-10 18:58:24,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968570481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:24,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:24,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:58:24,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476034579] [2022-01-10 18:58:24,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:24,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:58:24,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:58:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:25,010 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 61 states have internal predecessors, (103), 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 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:58:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:25,092 INFO L93 Difference]: Finished difference Result 140 states and 224 transitions. [2022-01-10 18:58:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:58:25,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2022-01-10 18:58:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:25,104 INFO L225 Difference]: With dead ends: 140 [2022-01-10 18:58:25,104 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 18:58:25,107 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 18:58:25,109 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 68 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:25,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:58:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 18:58:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-01-10 18:58:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 88 states have internal predecessors, (130), 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 18:58:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 130 transitions. [2022-01-10 18:58:25,158 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 130 transitions. Word has length 36 [2022-01-10 18:58:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 130 transitions. [2022-01-10 18:58:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:58:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 130 transitions. [2022-01-10 18:58:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 18:58:25,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:25,161 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] [2022-01-10 18:58:25,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:58:25,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -227328185, now seen corresponding path program 1 times [2022-01-10 18:58:25,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608307579] [2022-01-10 18:58:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:25,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:25,311 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 18:58:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608307579] [2022-01-10 18:58:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608307579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:25,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:25,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:58:25,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65199089] [2022-01-10 18:58:25,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:25,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:58:25,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:58:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:25,316 INFO L87 Difference]: Start difference. First operand 89 states and 130 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:25,356 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2022-01-10 18:58:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:58:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 18:58:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:25,360 INFO L225 Difference]: With dead ends: 213 [2022-01-10 18:58:25,360 INFO L226 Difference]: Without dead ends: 143 [2022-01-10 18:58:25,361 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 18:58:25,361 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:25,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:58:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-10 18:58:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-01-10 18:58:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 140 states have internal predecessors, (212), 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 18:58:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 212 transitions. [2022-01-10 18:58:25,375 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 212 transitions. Word has length 37 [2022-01-10 18:58:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:25,375 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 212 transitions. [2022-01-10 18:58:25,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 212 transitions. [2022-01-10 18:58:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 18:58:25,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:25,378 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] [2022-01-10 18:58:25,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:58:25,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1749230389, now seen corresponding path program 1 times [2022-01-10 18:58:25,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:25,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517886] [2022-01-10 18:58:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:25,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:25,502 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 18:58:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517886] [2022-01-10 18:58:25,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:25,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:25,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:58:25,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964335069] [2022-01-10 18:58:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:58:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:58:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:25,506 INFO L87 Difference]: Start difference. First operand 141 states and 212 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:25,535 INFO L93 Difference]: Finished difference Result 353 states and 546 transitions. [2022-01-10 18:58:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:58:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-10 18:58:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:25,540 INFO L225 Difference]: With dead ends: 353 [2022-01-10 18:58:25,540 INFO L226 Difference]: Without dead ends: 231 [2022-01-10 18:58:25,543 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 18:58:25,546 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 178 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:58:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-10 18:58:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2022-01-10 18:58:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5263157894736843) internal successors, (348), 228 states have internal predecessors, (348), 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 18:58:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2022-01-10 18:58:25,569 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 38 [2022-01-10 18:58:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:25,569 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2022-01-10 18:58:25,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2022-01-10 18:58:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 18:58:25,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:25,571 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] [2022-01-10 18:58:25,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:58:25,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -759808603, now seen corresponding path program 1 times [2022-01-10 18:58:25,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:25,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944446496] [2022-01-10 18:58:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:25,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:25,871 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 18:58:25,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:25,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944446496] [2022-01-10 18:58:25,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944446496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:25,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:58:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560445459] [2022-01-10 18:58:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:58:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:58:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:58:25,872 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:26,380 INFO L93 Difference]: Finished difference Result 1489 states and 2322 transitions. [2022-01-10 18:58:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:58:26,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 18:58:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:26,384 INFO L225 Difference]: With dead ends: 1489 [2022-01-10 18:58:26,385 INFO L226 Difference]: Without dead ends: 1279 [2022-01-10 18:58:26,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:58:26,387 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 357 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:26,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 562 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:58:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-01-10 18:58:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 437. [2022-01-10 18:58:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.5137614678899083) internal successors, (660), 436 states have internal predecessors, (660), 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 18:58:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 660 transitions. [2022-01-10 18:58:26,500 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 660 transitions. Word has length 39 [2022-01-10 18:58:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:26,500 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 660 transitions. [2022-01-10 18:58:26,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:58:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 660 transitions. [2022-01-10 18:58:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 18:58:26,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:26,501 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] [2022-01-10 18:58:26,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:58:26,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -62220189, now seen corresponding path program 1 times [2022-01-10 18:58:26,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:26,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633455989] [2022-01-10 18:58:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:26,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:26,578 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 18:58:26,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633455989] [2022-01-10 18:58:26,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633455989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:26,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:58:26,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772292777] [2022-01-10 18:58:26,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:26,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:58:26,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:58:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:26,581 INFO L87 Difference]: Start difference. First operand 437 states and 660 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 18:58:28,626 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 18:58:30,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:58:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:30,941 INFO L93 Difference]: Finished difference Result 1081 states and 1634 transitions. [2022-01-10 18:58:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:58:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-01-10 18:58:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:30,947 INFO L225 Difference]: With dead ends: 1081 [2022-01-10 18:58:30,947 INFO L226 Difference]: Without dead ends: 663 [2022-01-10 18:58:30,948 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 18:58:30,950 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 50 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:30,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 200 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-01-10 18:58:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-10 18:58:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 661. [2022-01-10 18:58:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.4666666666666666) internal successors, (968), 660 states have internal predecessors, (968), 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 18:58:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 968 transitions. [2022-01-10 18:58:31,103 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 968 transitions. Word has length 41 [2022-01-10 18:58:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 968 transitions. [2022-01-10 18:58:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 18:58:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 968 transitions. [2022-01-10 18:58:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 18:58:31,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:31,107 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] [2022-01-10 18:58:31,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 18:58:31,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash -61207295, now seen corresponding path program 1 times [2022-01-10 18:58:31,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:31,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64597101] [2022-01-10 18:58:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:31,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:31,361 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 18:58:31,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64597101] [2022-01-10 18:58:31,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64597101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:31,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:31,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:58:31,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261855477] [2022-01-10 18:58:31,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:31,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:58:31,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:31,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:58:31,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:58:31,363 INFO L87 Difference]: Start difference. First operand 661 states and 968 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 18:58:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:32,130 INFO L93 Difference]: Finished difference Result 2593 states and 3818 transitions. [2022-01-10 18:58:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:58:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 41 [2022-01-10 18:58:32,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:32,137 INFO L225 Difference]: With dead ends: 2593 [2022-01-10 18:58:32,137 INFO L226 Difference]: Without dead ends: 1951 [2022-01-10 18:58:32,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:58:32,139 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 348 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:32,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 557 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:58:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-01-10 18:58:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 661. [2022-01-10 18:58:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.4545454545454546) internal successors, (960), 660 states have internal predecessors, (960), 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 18:58:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 960 transitions. [2022-01-10 18:58:32,330 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 960 transitions. Word has length 41 [2022-01-10 18:58:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:32,330 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 960 transitions. [2022-01-10 18:58:32,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 18:58:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 960 transitions. [2022-01-10 18:58:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 18:58:32,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:32,331 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] [2022-01-10 18:58:32,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 18:58:32,331 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1927668592, now seen corresponding path program 1 times [2022-01-10 18:58:32,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401244563] [2022-01-10 18:58:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:32,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:32,474 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 18:58:32,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401244563] [2022-01-10 18:58:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401244563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:32,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:58:32,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036688728] [2022-01-10 18:58:32,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:32,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:58:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:58:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:32,477 INFO L87 Difference]: Start difference. First operand 661 states and 960 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 18:58:34,512 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 18:58:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:34,873 INFO L93 Difference]: Finished difference Result 1503 states and 2200 transitions. [2022-01-10 18:58:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:58:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-01-10 18:58:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:34,883 INFO L225 Difference]: With dead ends: 1503 [2022-01-10 18:58:34,883 INFO L226 Difference]: Without dead ends: 861 [2022-01-10 18:58:34,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:58:34,884 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:34,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 155 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 18:58:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-10 18:58:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 859. [2022-01-10 18:58:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.4522144522144522) internal successors, (1246), 858 states have internal predecessors, (1246), 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 18:58:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1246 transitions. [2022-01-10 18:58:35,134 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1246 transitions. Word has length 42 [2022-01-10 18:58:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:35,134 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1246 transitions. [2022-01-10 18:58:35,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 18:58:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1246 transitions. [2022-01-10 18:58:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 18:58:35,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:35,135 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] [2022-01-10 18:58:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 18:58:35,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1898324457, now seen corresponding path program 1 times [2022-01-10 18:58:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650041573] [2022-01-10 18:58:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:35,208 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 18:58:35,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650041573] [2022-01-10 18:58:35,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650041573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:58:35,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:58:35,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:58:35,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885359671] [2022-01-10 18:58:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:58:35,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:58:35,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:58:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:58:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:58:35,209 INFO L87 Difference]: Start difference. First operand 859 states and 1246 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 18:58:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:58:35,529 INFO L93 Difference]: Finished difference Result 1155 states and 1675 transitions. [2022-01-10 18:58:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:58:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 42 [2022-01-10 18:58:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:58:35,532 INFO L225 Difference]: With dead ends: 1155 [2022-01-10 18:58:35,532 INFO L226 Difference]: Without dead ends: 1153 [2022-01-10 18:58:35,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:58:35,534 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 159 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:58:35,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 259 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:58:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-01-10 18:58:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 875. [2022-01-10 18:58:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.4302059496567505) internal successors, (1250), 874 states have internal predecessors, (1250), 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 18:58:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1250 transitions. [2022-01-10 18:58:35,810 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1250 transitions. Word has length 42 [2022-01-10 18:58:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:58:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1250 transitions. [2022-01-10 18:58:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 18:58:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1250 transitions. [2022-01-10 18:58:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 18:58:35,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:58:35,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:35,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 18:58:35,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:58:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:58:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1629155261, now seen corresponding path program 1 times [2022-01-10 18:58:35,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:58:35,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870359928] [2022-01-10 18:58:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:58:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:58:36,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:58:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870359928] [2022-01-10 18:58:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870359928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:58:36,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206931741] [2022-01-10 18:58:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:58:36,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:58:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:58:36,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:58:36,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:58:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:58:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 18:58:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates...