/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:00:32,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:00:32,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:00:32,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:00:32,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:00:32,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:00:32,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:00:32,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:00:32,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:00:32,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:00:32,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:00:32,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:00:32,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:00:32,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:00:32,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:00:32,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:00:32,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:00:32,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:00:32,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:00:32,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:00:32,733 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:00:32,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:00:32,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:00:32,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:00:32,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:00:32,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 10:00:32,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 10:00:32,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 10:00:32,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 10:00:32,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 10:00:32,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 10:00:32,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 10:00:32,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 10:00:32,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 10:00:32,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:00:32,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:00:32,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:00:32,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:00:32,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:00:32,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:00:32,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:00:32,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:00:32,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:00:32,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:00:32,770 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:00:32,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:00:32,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:00:32,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:00:32,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:00:32,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:00:32,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:00:32,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:00:32,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:00:32,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:00:32,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:00:32,774 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:00:32,774 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:00:32,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:00:32,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:00:32,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:00:32,993 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:00:32,993 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:00:32,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-04-06 10:00:33,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0de157f/a6dc0d364acb41049d840e29ed48bb78/FLAG0ea01f8a3 [2022-04-06 10:00:33,439 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:00:33,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-04-06 10:00:33,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0de157f/a6dc0d364acb41049d840e29ed48bb78/FLAG0ea01f8a3 [2022-04-06 10:00:33,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d0de157f/a6dc0d364acb41049d840e29ed48bb78 [2022-04-06 10:00:33,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:00:33,457 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:00:33,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:00:33,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:00:33,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:00:33,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b3d4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33, skipping insertion in model container [2022-04-06 10:00:33,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:00:33,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:00:33,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-04-06 10:00:33,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:00:33,706 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:00:33,721 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-04-06 10:00:33,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:00:33,801 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:00:33,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33 WrapperNode [2022-04-06 10:00:33,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:00:33,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:00:33,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:00:33,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:00:33,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:00:33,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:00:33,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:00:33,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:00:33,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (1/1) ... [2022-04-06 10:00:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:00:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:33,912 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) [2022-04-06 10:00:33,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2022-04-06 10:00:33,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:00:33,938 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-04-06 10:00:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-04-06 10:00:33,918 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 [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-04-06 10:00:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:00:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:00:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:00:34,117 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:00:34,118 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:00:34,707 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:00:34,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:00:34,717 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 10:00:34,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:00:34 BoogieIcfgContainer [2022-04-06 10:00:34,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:00:34,720 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:00:34,720 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:00:34,721 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:00:34,723 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:00:34" (1/1) ... [2022-04-06 10:00:34,724 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:00:34,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:00:34 BasicIcfg [2022-04-06 10:00:34,749 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:00:34,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:00:34,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:00:34,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:00:34,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:00:33" (1/4) ... [2022-04-06 10:00:34,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ad288c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:00:34, skipping insertion in model container [2022-04-06 10:00:34,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:00:33" (2/4) ... [2022-04-06 10:00:34,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ad288c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:00:34, skipping insertion in model container [2022-04-06 10:00:34,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:00:34" (3/4) ... [2022-04-06 10:00:34,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ad288c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:00:34, skipping insertion in model container [2022-04-06 10:00:34,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:00:34" (4/4) ... [2022-04-06 10:00:34,759 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.cqvasr [2022-04-06 10:00:34,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:00:34,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:00:34,792 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:00:34,796 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 10:00:34,796 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:00:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 71 states have internal predecessors, (103), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 10:00:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:00:34,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:34,815 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:00:34,815 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash 418171227, now seen corresponding path program 1 times [2022-04-06 10:00:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844056958] [2022-04-06 10:00:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:00:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:00:35,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:35,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844056958] [2022-04-06 10:00:35,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844056958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:00:35,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:00:35,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:00:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982040768] [2022-04-06 10:00:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:00:35,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:00:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:00:35,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:00:35,126 INFO L87 Difference]: Start difference. First operand has 91 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 71 states have internal predecessors, (103), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:00:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:35,464 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2022-04-06 10:00:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:00:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-04-06 10:00:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:35,478 INFO L225 Difference]: With dead ends: 227 [2022-04-06 10:00:35,478 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 10:00:35,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 10:00:35,483 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 205 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:35,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 138 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:00:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 10:00:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-04-06 10:00:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-04-06 10:00:35,523 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2022-04-06 10:00:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:35,523 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-04-06 10:00:35,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:00:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-04-06 10:00:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 10:00:35,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:35,526 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:00:35,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:00:35,527 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1443663226, now seen corresponding path program 1 times [2022-04-06 10:00:35,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:35,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751949679] [2022-04-06 10:00:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 10:00:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 10:00:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751949679] [2022-04-06 10:00:35,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751949679] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:35,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192610574] [2022-04-06 10:00:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:35,796 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) [2022-04-06 10:00:35,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:00:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:00:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:00:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 10:00:36,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:00:36,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192610574] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:00:36,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 10:00:36,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-04-06 10:00:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698397071] [2022-04-06 10:00:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:00:36,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 10:00:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 10:00:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 10:00:36,103 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:00:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:36,135 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-04-06 10:00:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 10:00:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-04-06 10:00:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:36,137 INFO L225 Difference]: With dead ends: 136 [2022-04-06 10:00:36,137 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 10:00:36,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:00:36,140 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:36,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 278 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:00:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 10:00:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-06 10:00:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 59 states have internal predecessors, (76), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-04-06 10:00:36,155 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2022-04-06 10:00:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:36,155 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-04-06 10:00:36,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 10:00:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-04-06 10:00:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 10:00:36,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:36,157 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 10:00:36,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:00:36,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:36,375 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1707182856, now seen corresponding path program 1 times [2022-04-06 10:00:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:36,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404858692] [2022-04-06 10:00:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 10:00:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:00:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:36,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404858692] [2022-04-06 10:00:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404858692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836785926] [2022-04-06 10:00:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:36,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:36,573 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) [2022-04-06 10:00:36,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:00:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:36,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 10:00:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:00:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:00:36,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:00:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:00:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836785926] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:00:37,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:00:37,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-04-06 10:00:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409019898] [2022-04-06 10:00:37,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:00:37,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 10:00:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 10:00:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 10:00:37,048 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:37,530 INFO L93 Difference]: Finished difference Result 150 states and 199 transitions. [2022-04-06 10:00:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 10:00:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-04-06 10:00:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:37,531 INFO L225 Difference]: With dead ends: 150 [2022-04-06 10:00:37,531 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 10:00:37,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-04-06 10:00:37,532 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 109 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:37,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 142 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:00:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 10:00:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-04-06 10:00:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-04-06 10:00:37,538 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 48 [2022-04-06 10:00:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:37,538 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-04-06 10:00:37,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-04-06 10:00:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 10:00:37,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:37,539 INFO L499 BasicCegarLoop]: trace histogram [6, 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] [2022-04-06 10:00:37,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 10:00:37,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 10:00:37,756 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 126482426, now seen corresponding path program 2 times [2022-04-06 10:00:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405453084] [2022-04-06 10:00:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:37,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:37,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 10:00:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:00:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:37,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405453084] [2022-04-06 10:00:37,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405453084] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:37,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268325951] [2022-04-06 10:00:37,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:00:37,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:37,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:37,950 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) [2022-04-06 10:00:37,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:00:38,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:00:38,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:00:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 10:00:38,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:00:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 10:00:38,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:00:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:00:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268325951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:00:38,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:00:38,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-04-06 10:00:38,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561346175] [2022-04-06 10:00:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:00:38,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 10:00:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 10:00:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:00:38,812 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:39,579 INFO L93 Difference]: Finished difference Result 161 states and 209 transitions. [2022-04-06 10:00:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 10:00:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-04-06 10:00:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:39,580 INFO L225 Difference]: With dead ends: 161 [2022-04-06 10:00:39,580 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 10:00:39,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2022-04-06 10:00:39,581 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 104 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:39,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 161 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:00:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 10:00:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-04-06 10:00:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-04-06 10:00:39,587 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 52 [2022-04-06 10:00:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:39,587 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-04-06 10:00:39,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-04-06 10:00:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 10:00:39,588 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:39,588 INFO L499 BasicCegarLoop]: trace histogram [10, 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] [2022-04-06 10:00:39,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 10:00:39,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:39,794 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:39,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1937541626, now seen corresponding path program 3 times [2022-04-06 10:00:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:39,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613968290] [2022-04-06 10:00:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:39,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:39,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 10:00:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 10:00:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613968290] [2022-04-06 10:00:40,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613968290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730124961] [2022-04-06 10:00:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:00:40,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:40,057 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) [2022-04-06 10:00:40,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:00:40,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 10:00:40,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:00:40,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:00:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:00:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:00:41,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:00:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 10:00:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730124961] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:00:41,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:00:41,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2022-04-06 10:00:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486575595] [2022-04-06 10:00:41,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:00:41,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 10:00:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 10:00:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-04-06 10:00:41,384 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:43,373 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2022-04-06 10:00:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 10:00:43,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-04-06 10:00:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:43,375 INFO L225 Difference]: With dead ends: 174 [2022-04-06 10:00:43,375 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 10:00:43,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=550, Invalid=1802, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 10:00:43,378 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 147 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:43,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 211 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 10:00:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 10:00:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-04-06 10:00:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.225) internal successors, (98), 80 states have internal predecessors, (98), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-04-06 10:00:43,393 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 56 [2022-04-06 10:00:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:43,393 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-04-06 10:00:43,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-04-06 10:00:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 10:00:43,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:43,394 INFO L499 BasicCegarLoop]: trace histogram [19, 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] [2022-04-06 10:00:43,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 10:00:43,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:43,604 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1713650622, now seen corresponding path program 4 times [2022-04-06 10:00:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625718532] [2022-04-06 10:00:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:43,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:43,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 10:00:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 10:00:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:43,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625718532] [2022-04-06 10:00:43,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625718532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:43,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170746337] [2022-04-06 10:00:43,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 10:00:43,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:43,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:43,875 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) [2022-04-06 10:00:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 10:00:44,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 10:00:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:00:44,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 10:00:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:00:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 10:00:44,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:00:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 10:00:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170746337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:00:44,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 10:00:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-04-06 10:00:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878189667] [2022-04-06 10:00:44,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 10:00:44,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 10:00:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:00:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 10:00:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-04-06 10:00:44,866 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:00:55,913 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2022-04-06 10:00:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 10:00:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-04-06 10:00:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:00:55,914 INFO L225 Difference]: With dead ends: 185 [2022-04-06 10:00:55,914 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 10:00:55,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 10:00:55,917 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 153 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 10:00:55,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 251 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 10:00:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 10:00:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-04-06 10:00:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 89 states have (on average 1.202247191011236) internal successors, (107), 89 states have internal predecessors, (107), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 10:00:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-04-06 10:00:55,936 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 65 [2022-04-06 10:00:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:00:55,936 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-04-06 10:00:55,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 2 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 10:00:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-04-06 10:00:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 10:00:55,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:00:55,940 INFO L499 BasicCegarLoop]: trace histogram [28, 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] [2022-04-06 10:00:55,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 10:00:56,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:56,145 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:00:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:00:56,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1859967482, now seen corresponding path program 5 times [2022-04-06 10:00:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:00:56,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415401122] [2022-04-06 10:00:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:00:56,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:00:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:00:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:56,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 10:00:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 10:00:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:00:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 10:00:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:00:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415401122] [2022-04-06 10:00:56,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415401122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:00:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522821534] [2022-04-06 10:00:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 10:00:56,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:00:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:00:56,717 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) [2022-04-06 10:00:56,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process