/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:18:07,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:18:07,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:18:07,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:18:07,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:18:07,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:18:07,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:18:07,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:18:07,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:18:07,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:18:07,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:18:07,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:18:07,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:18:07,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:18:07,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:18:07,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:18:07,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:18:07,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:18:07,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:18:07,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:18:07,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:18:07,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:18:07,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:18:07,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:18:07,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 13:18:07,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 13:18:07,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 13:18:07,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 13:18:07,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 13:18:07,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 13:18:07,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 13:18:07,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 13:18:07,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 13:18:07,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 13:18:07,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 13:18:07,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 13:18:07,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 13:18:07,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 13:18:07,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:18:07,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:18:07,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:18:07,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:18:07,495 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:18:07,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:18:07,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:18:07,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:18:07,497 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:18:07,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:18:07,497 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:18:07,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:18:07,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:18:07,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:18:07,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:18:07,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:18:07,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:18:07,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:18:07,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:18:07,498 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:18:07,498 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:18:07,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:18:07,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:18:07,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:18:07,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:18:07,685 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:18:07,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/duplets.c [2022-01-31 13:18:07,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df7b41b/3b54feab216f493ab009a03ffe1b6707/FLAG2693b51c9 [2022-01-31 13:18:08,077 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:18:08,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c [2022-01-31 13:18:08,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df7b41b/3b54feab216f493ab009a03ffe1b6707/FLAG2693b51c9 [2022-01-31 13:18:08,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95df7b41b/3b54feab216f493ab009a03ffe1b6707 [2022-01-31 13:18:08,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:18:08,498 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:18:08,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:18:08,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:18:08,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:18:08,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2865aa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08, skipping insertion in model container [2022-01-31 13:18:08,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:18:08,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:18:08,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-01-31 13:18:08,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:18:08,667 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:18:08,675 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/duplets.c[485,498] [2022-01-31 13:18:08,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:18:08,698 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:18:08,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08 WrapperNode [2022-01-31 13:18:08,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:18:08,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:18:08,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:18:08,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:18:08,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:18:08,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:18:08,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:18:08,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:18:08,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (1/1) ... [2022-01-31 13:18:08,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:18:08,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:08,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 13:18:08,795 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 [2022-01-31 13:18:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:18:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:18:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:18:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:18:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:18:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2022-01-31 13:18:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2022-01-31 13:18:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:18:08,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-01-31 13:18:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-01-31 13:18:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-01-31 13:18:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:18:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:18:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:18:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:18:08,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 13:18:08,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-01-31 13:18:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:18:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:18:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:18:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:18:08,904 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:18:08,905 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:18:09,088 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:18:09,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:18:09,092 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 13:18:09,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:18:09 BoogieIcfgContainer [2022-01-31 13:18:09,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:18:09,095 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:18:09,095 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:18:09,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:18:09,098 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:18:09" (1/1) ... [2022-01-31 13:18:09,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:18:09 BasicIcfg [2022-01-31 13:18:09,119 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:18:09,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:18:09,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:18:09,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:18:09,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:18:08" (1/4) ... [2022-01-31 13:18:09,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7e6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:18:09, skipping insertion in model container [2022-01-31 13:18:09,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:18:08" (2/4) ... [2022-01-31 13:18:09,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7e6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:18:09, skipping insertion in model container [2022-01-31 13:18:09,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:18:09" (3/4) ... [2022-01-31 13:18:09,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d7e6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:18:09, skipping insertion in model container [2022-01-31 13:18:09,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:18:09" (4/4) ... [2022-01-31 13:18:09,126 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.cJordan [2022-01-31 13:18:09,130 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:18:09,131 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:18:09,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:18:09,174 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-01-31 13:18:09,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:18:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 13:18:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 13:18:09,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:09,198 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:09,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1613559281, now seen corresponding path program 1 times [2022-01-31 13:18:09,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009980750] [2022-01-31 13:18:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:09,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:09,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:09,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009980750] [2022-01-31 13:18:09,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009980750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:09,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:09,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:18:09,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072231998] [2022-01-31 13:18:09,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:09,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:18:09,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:18:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:18:09,500 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 13:18:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:09,653 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-01-31 13:18:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:18:09,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-01-31 13:18:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:09,660 INFO L225 Difference]: With dead ends: 61 [2022-01-31 13:18:09,661 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 13:18:09,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:18:09,664 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:09,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:18:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 13:18:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-01-31 13:18:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:18:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-01-31 13:18:09,691 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 49 [2022-01-31 13:18:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:09,692 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-01-31 13:18:09,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 13:18:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-01-31 13:18:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 13:18:09,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:09,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:09,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:18:09,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1068751152, now seen corresponding path program 1 times [2022-01-31 13:18:09,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:09,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236846170] [2022-01-31 13:18:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:09,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:09,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236846170] [2022-01-31 13:18:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236846170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:09,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255235362] [2022-01-31 13:18:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:09,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:10,012 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) [2022-01-31 13:18:10,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:18:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 13:18:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:10,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:10,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255235362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:18:10,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:18:10,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2022-01-31 13:18:10,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215528093] [2022-01-31 13:18:10,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 13:18:10,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 13:18:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-31 13:18:10,704 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-31 13:18:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:11,081 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-01-31 13:18:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 13:18:11,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 49 [2022-01-31 13:18:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:11,085 INFO L225 Difference]: With dead ends: 66 [2022-01-31 13:18:11,085 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 13:18:11,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-01-31 13:18:11,088 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 102 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:11,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 52 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:18:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 13:18:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-01-31 13:18:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:18:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 13:18:11,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 49 [2022-01-31 13:18:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 13:18:11,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-31 13:18:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 13:18:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 13:18:11,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:11,108 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:11,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 13:18:11,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:11,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1304641222, now seen corresponding path program 1 times [2022-01-31 13:18:11,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133256638] [2022-01-31 13:18:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:11,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:11,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133256638] [2022-01-31 13:18:11,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133256638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:11,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:11,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 13:18:11,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921101075] [2022-01-31 13:18:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:11,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:18:11,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:11,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:18:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:18:11,455 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:11,718 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-01-31 13:18:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:18:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 50 [2022-01-31 13:18:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:11,719 INFO L225 Difference]: With dead ends: 73 [2022-01-31 13:18:11,719 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 13:18:11,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:18:11,720 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:11,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 57 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:18:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 13:18:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-01-31 13:18:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 13:18:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-01-31 13:18:11,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 50 [2022-01-31 13:18:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:11,725 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-01-31 13:18:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-01-31 13:18:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 13:18:11,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:11,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:11,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 13:18:11,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1610834198, now seen corresponding path program 1 times [2022-01-31 13:18:11,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296033830] [2022-01-31 13:18:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:11,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:12,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:12,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296033830] [2022-01-31 13:18:12,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296033830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496477707] [2022-01-31 13:18:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:12,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:12,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:12,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:18:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 13:18:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:12,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 13:18:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496477707] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:12,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:18:12,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 12] total 25 [2022-01-31 13:18:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001549351] [2022-01-31 13:18:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 13:18:12,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 13:18:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-31 13:18:12,834 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 13:18:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:12,952 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-01-31 13:18:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:18:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2022-01-31 13:18:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:12,954 INFO L225 Difference]: With dead ends: 80 [2022-01-31 13:18:12,954 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 13:18:12,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-31 13:18:12,957 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:12,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 412 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:18:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 13:18:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2022-01-31 13:18:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 13:18:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-01-31 13:18:12,972 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 52 [2022-01-31 13:18:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-01-31 13:18:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 13:18:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-01-31 13:18:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 13:18:12,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:12,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:13,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:13,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 13:18:13,179 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -58927682, now seen corresponding path program 1 times [2022-01-31 13:18:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841751433] [2022-01-31 13:18:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:13,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:13,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841751433] [2022-01-31 13:18:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841751433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205150832] [2022-01-31 13:18:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:13,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:13,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:13,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:18:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 13:18:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:13,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205150832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:18:13,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:18:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-01-31 13:18:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317250228] [2022-01-31 13:18:13,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:13,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:18:13,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:18:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 13:18:13,460 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:13,620 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2022-01-31 13:18:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:18:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 55 [2022-01-31 13:18:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:13,624 INFO L225 Difference]: With dead ends: 67 [2022-01-31 13:18:13,624 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 13:18:13,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:18:13,625 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:13,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:18:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 13:18:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-01-31 13:18:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 13:18:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-01-31 13:18:13,637 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2022-01-31 13:18:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:13,639 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-01-31 13:18:13,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-01-31 13:18:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 13:18:13,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:13,645 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-01-31 13:18:13,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:13,846 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 925124550, now seen corresponding path program 1 times [2022-01-31 13:18:13,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:13,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822575376] [2022-01-31 13:18:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:13,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:18:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:14,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:14,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822575376] [2022-01-31 13:18:14,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822575376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:14,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937837894] [2022-01-31 13:18:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:14,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:14,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:14,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:14,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:18:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 13:18:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:14,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 13:18:14,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-31 13:18:14,400 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-31 13:18:14,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-01-31 13:18:14,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-31 13:18:14,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-31 13:18:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:14,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:18:14,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937837894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:14,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 13:18:14,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 25 [2022-01-31 13:18:14,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541385606] [2022-01-31 13:18:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:14,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 13:18:14,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 13:18:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2022-01-31 13:18:14,518 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:14,694 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2022-01-31 13:18:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 13:18:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-01-31 13:18:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:14,695 INFO L225 Difference]: With dead ends: 83 [2022-01-31 13:18:14,695 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 13:18:14,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-01-31 13:18:14,696 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:14,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 441 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:18:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 13:18:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-01-31 13:18:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 13:18:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-01-31 13:18:14,699 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 57 [2022-01-31 13:18:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:14,700 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-01-31 13:18:14,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-01-31 13:18:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 13:18:14,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:14,700 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-01-31 13:18:14,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:14,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 926048071, now seen corresponding path program 1 times [2022-01-31 13:18:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450934045] [2022-01-31 13:18:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:18:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:15,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450934045] [2022-01-31 13:18:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450934045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:15,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:15,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 13:18:15,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373629897] [2022-01-31 13:18:15,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 13:18:15,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 13:18:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-01-31 13:18:15,089 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:15,466 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-01-31 13:18:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:18:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-01-31 13:18:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:15,467 INFO L225 Difference]: With dead ends: 92 [2022-01-31 13:18:15,467 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 13:18:15,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-31 13:18:15,468 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:15,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 56 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:18:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 13:18:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2022-01-31 13:18:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 57 states have internal predecessors, (65), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 13:18:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-01-31 13:18:15,471 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 57 [2022-01-31 13:18:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:15,471 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-01-31 13:18:15,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-01-31 13:18:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 13:18:15,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:15,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-01-31 13:18:15,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 13:18:15,477 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash -984079512, now seen corresponding path program 2 times [2022-01-31 13:18:15,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717547984] [2022-01-31 13:18:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:15,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:15,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:16,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:16,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 13:18:16,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717547984] [2022-01-31 13:18:16,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717547984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142955644] [2022-01-31 13:18:16,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:18:16,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:16,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:16,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:16,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:18:16,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:18:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:18:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 13:18:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:16,662 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 13:18:16,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-01-31 13:18:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 13:18:18,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:18,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142955644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:18,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:18:18,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-01-31 13:18:18,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133881548] [2022-01-31 13:18:18,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:18,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 13:18:18,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 13:18:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1035, Unknown=1, NotChecked=0, Total=1122 [2022-01-31 13:18:18,411 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 13:18:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:21,592 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2022-01-31 13:18:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 13:18:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 58 [2022-01-31 13:18:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:21,593 INFO L225 Difference]: With dead ends: 96 [2022-01-31 13:18:21,593 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 13:18:21,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=230, Invalid=2525, Unknown=1, NotChecked=0, Total=2756 [2022-01-31 13:18:21,594 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:21,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 286 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 890 Invalid, 0 Unknown, 328 Unchecked, 0.5s Time] [2022-01-31 13:18:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 13:18:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-01-31 13:18:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 13:18:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-01-31 13:18:21,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 58 [2022-01-31 13:18:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:21,598 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-01-31 13:18:21,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 12 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 13:18:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-01-31 13:18:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 13:18:21,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:21,599 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2022-01-31 13:18:21,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:21,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1828813328, now seen corresponding path program 3 times [2022-01-31 13:18:21,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632217749] [2022-01-31 13:18:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:21,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:21,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632217749] [2022-01-31 13:18:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632217749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003900481] [2022-01-31 13:18:21,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:18:21,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:21,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:18:21,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 13:18:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:18:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 13:18:21,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003900481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:18:22,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:18:22,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 10 [2022-01-31 13:18:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587939543] [2022-01-31 13:18:22,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:22,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:18:22,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:18:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:18:22,176 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:22,435 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2022-01-31 13:18:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:18:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 61 [2022-01-31 13:18:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:22,436 INFO L225 Difference]: With dead ends: 101 [2022-01-31 13:18:22,436 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 13:18:22,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-01-31 13:18:22,437 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:22,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 57 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:18:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 13:18:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-01-31 13:18:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 69 states have internal predecessors, (82), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 13:18:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-01-31 13:18:22,441 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 61 [2022-01-31 13:18:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:22,441 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-01-31 13:18:22,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-01-31 13:18:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-01-31 13:18:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 13:18:22,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:22,442 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-01-31 13:18:22,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:22,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:22,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1290066965, now seen corresponding path program 1 times [2022-01-31 13:18:22,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279821603] [2022-01-31 13:18:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:22,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:18:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 13:18:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 13:18:22,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:22,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279821603] [2022-01-31 13:18:22,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279821603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:22,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:22,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 13:18:22,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411960064] [2022-01-31 13:18:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:22,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 13:18:22,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 13:18:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:18:22,772 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:23,126 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-01-31 13:18:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:18:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-01-31 13:18:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:23,127 INFO L225 Difference]: With dead ends: 109 [2022-01-31 13:18:23,127 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 13:18:23,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-31 13:18:23,128 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:23,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 56 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:18:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 13:18:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-01-31 13:18:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 13:18:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-01-31 13:18:23,131 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 64 [2022-01-31 13:18:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:23,131 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-01-31 13:18:23,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-01-31 13:18:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 13:18:23,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:23,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-01-31 13:18:23,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 13:18:23,132 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1289143444, now seen corresponding path program 1 times [2022-01-31 13:18:23,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494559230] [2022-01-31 13:18:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:23,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:18:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 13:18:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 13:18:23,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494559230] [2022-01-31 13:18:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494559230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:23,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:23,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 13:18:23,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177238555] [2022-01-31 13:18:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:23,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:18:23,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:18:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:18:23,212 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:23,460 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-01-31 13:18:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:18:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-01-31 13:18:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:23,461 INFO L225 Difference]: With dead ends: 107 [2022-01-31 13:18:23,461 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 13:18:23,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:18:23,461 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 77 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:23,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 50 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:18:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 13:18:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-01-31 13:18:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 13:18:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-01-31 13:18:23,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 64 [2022-01-31 13:18:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-01-31 13:18:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-01-31 13:18:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 13:18:23,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:23,465 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-01-31 13:18:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 13:18:23,466 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1636548555, now seen corresponding path program 1 times [2022-01-31 13:18:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482731999] [2022-01-31 13:18:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:23,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 13:18:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482731999] [2022-01-31 13:18:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482731999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561213373] [2022-01-31 13:18:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:23,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:23,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:23,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:18:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 13:18:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 13:18:23,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:18:23,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561213373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:18:23,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:18:23,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 9 [2022-01-31 13:18:23,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683966096] [2022-01-31 13:18:23,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:23,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 13:18:23,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 13:18:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 13:18:23,802 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:24,048 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-01-31 13:18:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 13:18:24,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2022-01-31 13:18:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:24,049 INFO L225 Difference]: With dead ends: 116 [2022-01-31 13:18:24,049 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 13:18:24,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-31 13:18:24,050 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 86 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:24,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 56 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:18:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 13:18:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2022-01-31 13:18:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 13:18:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-01-31 13:18:24,053 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 63 [2022-01-31 13:18:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-01-31 13:18:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 13:18:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-01-31 13:18:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 13:18:24,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:24,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-01-31 13:18:24,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:24,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:24,267 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 937349773, now seen corresponding path program 2 times [2022-01-31 13:18:24,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316235047] [2022-01-31 13:18:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 13:18:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 13:18:24,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:24,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316235047] [2022-01-31 13:18:24,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316235047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:18:24,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:18:24,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 13:18:24,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387150971] [2022-01-31 13:18:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:24,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 13:18:24,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 13:18:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:18:24,425 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:24,868 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-01-31 13:18:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 13:18:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-01-31 13:18:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:24,870 INFO L225 Difference]: With dead ends: 108 [2022-01-31 13:18:24,870 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 13:18:24,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-31 13:18:24,870 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:24,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 67 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 13:18:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 13:18:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2022-01-31 13:18:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-01-31 13:18:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-01-31 13:18:24,873 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 66 [2022-01-31 13:18:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:24,873 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-01-31 13:18:24,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 13:18:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-01-31 13:18:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 13:18:24,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:24,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:24,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 13:18:24,874 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -455253687, now seen corresponding path program 1 times [2022-01-31 13:18:24,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:24,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030731909] [2022-01-31 13:18:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:24,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:18:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 13:18:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 13:18:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 13:18:25,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030731909] [2022-01-31 13:18:25,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030731909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180589561] [2022-01-31 13:18:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:25,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:25,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:25,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:18:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:25,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 13:18:25,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:25,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 13:18:25,323 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-31 13:18:25,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 13:18:25,351 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-01-31 13:18:25,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2022-01-31 13:18:25,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:18:25,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-31 13:18:25,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:18:25,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 13:18:25,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-01-31 13:18:25,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:18:25,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-01-31 13:18:25,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:18:25,763 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 13:18:25,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-31 13:18:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:18:25,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:25,942 INFO L353 Elim1Store]: treesize reduction 28, result has 33.3 percent of original size [2022-01-31 13:18:25,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 52 [2022-01-31 13:18:25,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:25,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-01-31 13:18:25,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:25,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-01-31 13:18:25,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2022-01-31 13:18:25,960 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-31 13:18:25,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 13:18:25,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:26,007 INFO L353 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-01-31 13:18:26,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 87 [2022-01-31 13:18:26,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:26,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 215 [2022-01-31 13:18:26,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:26,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 216 [2022-01-31 13:18:26,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:26,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-31 13:18:26,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:26,117 INFO L353 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-01-31 13:18:26,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2022-01-31 13:18:26,144 INFO L353 Elim1Store]: treesize reduction 5, result has 16.7 percent of original size [2022-01-31 13:18:26,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2022-01-31 13:18:26,355 INFO L353 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-01-31 13:18:26,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 166 [2022-01-31 13:18:26,533 INFO L353 Elim1Store]: treesize reduction 20, result has 64.9 percent of original size [2022-01-31 13:18:26,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 162 [2022-01-31 13:18:26,690 INFO L353 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-01-31 13:18:26,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 1 [2022-01-31 13:18:26,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:26,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 78 [2022-01-31 13:18:26,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:26,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-01-31 13:18:27,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-31 13:18:27,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 13:18:27,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 13:18:27,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:18:27,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-01-31 13:18:27,138 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-31 13:18:27,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:18:27,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:18:27,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-31 13:18:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:18:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180589561] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:27,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:18:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16, 11] total 27 [2022-01-31 13:18:27,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037335415] [2022-01-31 13:18:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:18:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:18:27,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:18:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-31 13:18:27,354 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-31 13:18:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:18:27,514 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2022-01-31 13:18:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:18:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-01-31 13:18:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:18:27,515 INFO L225 Difference]: With dead ends: 108 [2022-01-31 13:18:27,515 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 13:18:27,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-01-31 13:18:27,515 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:18:27,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 465 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:18:27,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 13:18:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-01-31 13:18:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.125) internal successors, (81), 75 states have internal predecessors, (81), 21 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 13:18:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-01-31 13:18:27,518 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 70 [2022-01-31 13:18:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:18:27,519 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-01-31 13:18:27,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-31 13:18:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-01-31 13:18:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 13:18:27,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:18:27,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:18:27,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 13:18:27,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 13:18:27,746 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:18:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:18:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -633726750, now seen corresponding path program 4 times [2022-01-31 13:18:27,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:18:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81863008] [2022-01-31 13:18:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:18:27,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:18:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:27,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:18:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:27,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:18:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:27,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:18:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:18:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:28,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:18:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:18:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:18:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:18:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 13:18:30,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:18:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81863008] [2022-01-31 13:18:30,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81863008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295681223] [2022-01-31 13:18:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 13:18:30,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:18:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:18:30,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:18:30,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 13:18:30,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 13:18:30,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:18:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-31 13:18:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:18:30,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-01-31 13:18:38,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-01-31 13:18:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 13:18:45,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:18:45,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295681223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:18:45,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:18:45,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 44 [2022-01-31 13:18:45,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503462420] [2022-01-31 13:18:45,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:18:45,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 13:18:45,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:18:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 13:18:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1755, Unknown=8, NotChecked=0, Total=1980 [2022-01-31 13:18:45,590 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 44 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-01-31 13:19:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:19:01,054 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2022-01-31 13:19:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 13:19:01,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 67 [2022-01-31 13:19:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:19:01,057 INFO L225 Difference]: With dead ends: 127 [2022-01-31 13:19:01,057 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 13:19:01,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=692, Invalid=6098, Unknown=16, NotChecked=0, Total=6806 [2022-01-31 13:19:01,061 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 125 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:19:01,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 158 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1399 Invalid, 0 Unknown, 174 Unchecked, 1.2s Time] [2022-01-31 13:19:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 13:19:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2022-01-31 13:19:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.109375) internal successors, (71), 66 states have internal predecessors, (71), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 13:19:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2022-01-31 13:19:01,069 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 67 [2022-01-31 13:19:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:19:01,069 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2022-01-31 13:19:01,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 37 states have internal predecessors, (67), 9 states have call successors, (16), 4 states have call predecessors, (16), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-01-31 13:19:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2022-01-31 13:19:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 13:19:01,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:19:01,070 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-01-31 13:19:01,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 13:19:01,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 13:19:01,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:19:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:19:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -516817935, now seen corresponding path program 1 times [2022-01-31 13:19:01,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:19:01,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242716044] [2022-01-31 13:19:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:19:01,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:19:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:19:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:19:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:19:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:19:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:19:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:19:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:19:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:19:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 13:19:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 13:19:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 13:19:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 13:19:01,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:19:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242716044] [2022-01-31 13:19:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242716044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:19:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387783540] [2022-01-31 13:19:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:19:01,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:19:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:19:01,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:19:01,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 13:19:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 13:19:01,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:19:01,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 13:19:01,819 INFO L353 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-01-31 13:19:01,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-01-31 13:19:02,126 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 13:19:02,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-01-31 13:19:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:19:02,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:19:02,405 INFO L353 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-01-31 13:19:02,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 670 treesize of output 606 [2022-01-31 13:19:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 13:19:02,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387783540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:19:02,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:19:02,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-01-31 13:19:02,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569024672] [2022-01-31 13:19:02,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:19:02,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 13:19:02,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:19:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 13:19:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-31 13:19:02,904 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-01-31 13:19:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:19:04,265 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2022-01-31 13:19:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 13:19:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) Word has length 73 [2022-01-31 13:19:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:19:04,266 INFO L225 Difference]: With dead ends: 145 [2022-01-31 13:19:04,266 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 13:19:04,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=2916, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 13:19:04,268 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 161 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 13:19:04,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 74 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1268 Invalid, 0 Unknown, 141 Unchecked, 0.6s Time] [2022-01-31 13:19:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 13:19:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 80. [2022-01-31 13:19:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:19:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-01-31 13:19:04,272 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 73 [2022-01-31 13:19:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:19:04,272 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-01-31 13:19:04,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.92) internal successors, (73), 27 states have internal predecessors, (73), 10 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (18), 5 states have call predecessors, (18), 8 states have call successors, (18) [2022-01-31 13:19:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-01-31 13:19:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 13:19:04,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:19:04,273 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:19:04,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 13:19:04,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 13:19:04,491 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:19:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:19:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2020932442, now seen corresponding path program 1 times [2022-01-31 13:19:04,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:19:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802727906] [2022-01-31 13:19:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:19:04,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:19:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:19:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:19:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:19:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:19:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:19:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:19:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:19:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:19:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 13:19:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 13:19:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 13:19:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 13:19:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 13:19:04,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:19:04,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802727906] [2022-01-31 13:19:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802727906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:19:04,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876974369] [2022-01-31 13:19:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:19:04,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:19:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:19:04,859 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:19:04,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 13:19:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:19:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 118 conjunts are in the unsatisfiable core [2022-01-31 13:19:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:19:04,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-01-31 13:19:05,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:19:07,250 WARN L860 $PredicateComparison]: unable to prove that (exists ((mkdup_~j~0 Int) (mkdup_~x~0 Int) (mkdup_~i~0 Int)) (and (<= 0 mkdup_~j~0) (not (= mkdup_~j~0 mkdup_~i~0)) (= (store |c_old(#memory_int)| |c_mkdup_#in~a.base| (store (store (select |c_old(#memory_int)| |c_mkdup_#in~a.base|) (+ |c_mkdup_#in~a.offset| (* mkdup_~i~0 4)) mkdup_~x~0) (+ (* mkdup_~j~0 4) |c_mkdup_#in~a.offset|) mkdup_~x~0)) |c_#memory_int|) (<= 0 mkdup_~i~0))) is different from true [2022-01-31 13:19:07,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-01-31 13:19:11,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 13:19:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:19:13,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 52 [2022-01-31 13:19:13,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:19:13,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:19:13,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 52 [2022-01-31 13:19:13,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:19:13,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:20:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:20:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:20:11,200 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 13:20:11,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-01-31 13:20:11,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-01-31 13:20:11,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-01-31 13:20:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 13:20:11,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:20:28,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 13:20:28,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-01-31 13:20:36,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876974369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:20:36,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:20:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 39 [2022-01-31 13:20:36,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680686938] [2022-01-31 13:20:36,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:20:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 13:20:36,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:20:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 13:20:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2160, Unknown=23, NotChecked=94, Total=2450 [2022-01-31 13:20:36,688 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-31 13:21:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:21:39,919 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-01-31 13:21:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 13:21:39,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) Word has length 76 [2022-01-31 13:21:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:21:39,920 INFO L225 Difference]: With dead ends: 127 [2022-01-31 13:21:39,920 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 13:21:39,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 151.3s TimeCoverageRelationStatistics Valid=415, Invalid=5386, Unknown=55, NotChecked=150, Total=6006 [2022-01-31 13:21:39,922 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 13:21:39,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 188 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1047 Invalid, 0 Unknown, 274 Unchecked, 0.5s Time] [2022-01-31 13:21:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 13:21:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-01-31 13:21:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 13:21:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-01-31 13:21:39,924 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 76 [2022-01-31 13:21:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:21:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-01-31 13:21:39,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 2.032258064516129) internal successors, (63), 29 states have internal predecessors, (63), 13 states have call successors, (26), 6 states have call predecessors, (26), 8 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-31 13:21:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-01-31 13:21:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 13:21:39,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:21:39,925 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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, 1] [2022-01-31 13:21:39,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 13:21:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 13:21:40,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:21:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:21:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1729343584, now seen corresponding path program 1 times [2022-01-31 13:21:40,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:21:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724714485] [2022-01-31 13:21:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:21:40,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:21:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:21:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:21:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 13:21:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 13:21:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-31 13:21:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:21:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:21:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 13:21:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 13:21:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 13:21:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 13:21:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 13:21:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 13:21:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:21:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724714485] [2022-01-31 13:21:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724714485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:21:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920166628] [2022-01-31 13:21:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:21:40,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:21:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:21:40,492 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:21:40,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 13:21:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:21:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-31 13:21:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:21:40,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 13:21:40,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-31 13:21:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:21:40,821 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-31 13:21:40,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 18 [2022-01-31 13:21:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:21:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:21:41,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-01-31 13:21:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:21:41,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 36 [2022-01-31 13:21:41,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:21:41,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-31 13:21:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 13:21:42,131 INFO L353 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-01-31 13:21:42,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-01-31 13:21:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 13:21:42,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:21:42,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920166628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:21:42,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:21:42,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2022-01-31 13:21:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053015740] [2022-01-31 13:21:42,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:21:42,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 13:21:42,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:21:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 13:21:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-01-31 13:21:42,389 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 13:21:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:21:43,337 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2022-01-31 13:21:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 13:21:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 85 [2022-01-31 13:21:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:21:43,338 INFO L225 Difference]: With dead ends: 123 [2022-01-31 13:21:43,338 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 13:21:43,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 13:21:43,339 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:21:43,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 197 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 712 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-01-31 13:21:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 13:21:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 13:21:43,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-01-31 13:21:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 13:21:43,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2022-01-31 13:21:43,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:21:43,340 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 13:21:43,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 10 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-31 13:21:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 13:21:43,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 13:21:43,342 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 13:21:43,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 13:21:43,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 13:21:43,554 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:21:43,555 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 13:21:43,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:21:43 BasicIcfg [2022-01-31 13:21:43,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 13:21:43,557 INFO L158 Benchmark]: Toolchain (without parser) took 215058.91ms. Allocated memory was 197.1MB in the beginning and 395.3MB in the end (delta: 198.2MB). Free memory was 147.8MB in the beginning and 151.1MB in the end (delta: -3.3MB). Peak memory consumption was 195.6MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,557 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 164.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 13:21:43,557 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.51ms. Allocated memory is still 197.1MB. Free memory was 147.5MB in the beginning and 172.9MB in the end (delta: -25.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,557 INFO L158 Benchmark]: Boogie Preprocessor took 33.43ms. Allocated memory is still 197.1MB. Free memory was 172.9MB in the beginning and 171.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,557 INFO L158 Benchmark]: RCFGBuilder took 359.74ms. Allocated memory is still 197.1MB. Free memory was 170.8MB in the beginning and 156.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,557 INFO L158 Benchmark]: IcfgTransformer took 24.12ms. Allocated memory is still 197.1MB. Free memory was 156.6MB in the beginning and 155.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,558 INFO L158 Benchmark]: TraceAbstraction took 214436.69ms. Allocated memory was 197.1MB in the beginning and 395.3MB in the end (delta: 198.2MB). Free memory was 154.5MB in the beginning and 151.1MB in the end (delta: 3.5MB). Peak memory consumption was 202.4MB. Max. memory is 8.0GB. [2022-01-31 13:21:43,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 164.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.51ms. Allocated memory is still 197.1MB. Free memory was 147.5MB in the beginning and 172.9MB in the end (delta: -25.4MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.43ms. Allocated memory is still 197.1MB. Free memory was 172.9MB in the beginning and 171.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 359.74ms. Allocated memory is still 197.1MB. Free memory was 170.8MB in the beginning and 156.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * IcfgTransformer took 24.12ms. Allocated memory is still 197.1MB. Free memory was 156.6MB in the beginning and 155.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 214436.69ms. Allocated memory was 197.1MB in the beginning and 395.3MB in the end (delta: 198.2MB). Free memory was 154.5MB in the beginning and 151.1MB in the end (delta: 3.5MB). Peak memory consumption was 202.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 214.4s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 87.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1564 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1476 mSDsluCounter, 2778 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1183 IncrementalHoareTripleChecker+Unchecked, 1935 mSDsCounter, 1102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9768 IncrementalHoareTripleChecker+Invalid, 12053 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1102 mSolverCounterUnsat, 843 mSDtfsCounter, 9768 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2048 GetRequests, 1438 SyntacticMatches, 47 SemanticMatches, 563 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6253 ImplicationChecksByTransitivity, 190.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=14, InterpolantAutomatonStates: 328, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 178 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 122.5s InterpolantComputationTime, 1882 NumberOfCodeBlocks, 1882 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2268 ConstructedInterpolants, 125 QuantifiedInterpolants, 18465 SizeOfPredicates, 160 NumberOfNonLiveVariables, 3199 ConjunctsInSsa, 507 ConjunctsInUnsatCore, 37 InterpolantComputations, 9 PerfectInterpolantSequences, 1138/1327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 13:21:43,778 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-01-31 13:21:43,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...