/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-7390193 [2022-04-05 05:42:56,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:42:56,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:42:56,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 05:42:56,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 05:42:56,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 05:42:56,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 05:42:56,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 05:42:56,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 05:42:56,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 05:42:56,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 05:42:56,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 05:42:56,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:42:56,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:42:56,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:42:56,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:42:56,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:42:56,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:42:56,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:42:56,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:42:56,903 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:42:56,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:42:56,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:42:56,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:42:56,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:42:56,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-05 05:42:56,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-05 05:42:56,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-05 05:42:56,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-05 05:42:56,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-05 05:42:56,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-04-05 05:42:56,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:42:56,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:42:56,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:42:56,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:42:56,933 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:42:56,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:42:56,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:42:56,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:42:56,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:42:56,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:42:56,934 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:42:56,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:42:56,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:42:56,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:42:56,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:42:56,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:42:56,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:42:56,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:42:56,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:42:56,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:42:56,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:42:56,938 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:42:56,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:42:57,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:42:57,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:42:57,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:42:57,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:42:57,151 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:42:57,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-04-05 05:42:57,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a2b919/523acc87bcda42e28a0d5d289b2b95c6/FLAG452693d47 [2022-04-05 05:42:57,560 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:42:57,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-04-05 05:42:57,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a2b919/523acc87bcda42e28a0d5d289b2b95c6/FLAG452693d47 [2022-04-05 05:42:57,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1a2b919/523acc87bcda42e28a0d5d289b2b95c6 [2022-04-05 05:42:57,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:42:57,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:42:57,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:42:57,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:42:57,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:42:57,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174b403b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57, skipping insertion in model container [2022-04-05 05:42:57,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:42:57,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:42:57,757 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] [2022-04-05 05:42:57,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:42:57,825 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:42:57,838 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] [2022-04-05 05:42:57,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:42:57,894 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:42:57,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57 WrapperNode [2022-04-05 05:42:57,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:42:57,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:42:57,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:42:57,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:42:57,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:42:57,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:42:57,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:42:57,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:42:57,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (1/1) ... [2022-04-05 05:42:57,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:42:58,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:42:58,012 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) [2022-04-05 05:42:58,042 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 [2022-04-05 05:42:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:42:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:42:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:42:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:42:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2022-04-05 05:42:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2022-04-05 05:42:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2022-04-05 05:42:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2022-04-05 05:42:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2022-04-05 05:42:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2022-04-05 05:42:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:42:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-04-05 05:42:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:42:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:42:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:42:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2022-04-05 05:42:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-05 05:42:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:42:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:42:58,212 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:42:58,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:42:58,913 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:42:58,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:42:58,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:42:58,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:42:58 BoogieIcfgContainer [2022-04-05 05:42:58,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:42:58,922 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:42:58,922 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:42:58,923 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:42:58,925 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:42:58" (1/1) ... [2022-04-05 05:42:58,927 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:42:58,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:42:58 BasicIcfg [2022-04-05 05:42:58,951 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:42:58,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:42:58,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:42:58,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:42:58,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:42:57" (1/4) ... [2022-04-05 05:42:58,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2425523d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:42:58, skipping insertion in model container [2022-04-05 05:42:58,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:42:57" (2/4) ... [2022-04-05 05:42:58,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2425523d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:42:58, skipping insertion in model container [2022-04-05 05:42:58,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:42:58" (3/4) ... [2022-04-05 05:42:58,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2425523d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:42:58, skipping insertion in model container [2022-04-05 05:42:58,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:42:58" (4/4) ... [2022-04-05 05:42:58,960 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.cqvasr [2022-04-05 05:42:58,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:42:58,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:42:59,001 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:42:59,005 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 [2022-04-05 05:42:59,005 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:42:59,015 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) [2022-04-05 05:42:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 05:42:59,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:42:59,020 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] [2022-04-05 05:42:59,020 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:42:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:42:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash 418171227, now seen corresponding path program 1 times [2022-04-05 05:42:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:42:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141485831] [2022-04-05 05:42:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:42:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:42:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:42:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:42:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:42:59,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:42:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:42:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:42:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:42:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:42:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:42:59,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141485831] [2022-04-05 05:42:59,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141485831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:42:59,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:42:59,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 05:42:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55951776] [2022-04-05 05:42:59,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:42:59,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:42:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:42:59,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:42:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:42:59,371 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) [2022-04-05 05:42:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:42:59,736 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2022-04-05 05:42:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:42:59,738 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 [2022-04-05 05:42:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:42:59,745 INFO L225 Difference]: With dead ends: 227 [2022-04-05 05:42:59,745 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 05:42:59,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:42:59,752 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, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:42:59,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 138 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:42:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 05:42:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-04-05 05:42:59,790 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) [2022-04-05 05:42:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-04-05 05:42:59,795 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2022-04-05 05:42:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:42:59,796 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-04-05 05:42:59,797 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) [2022-04-05 05:42:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-04-05 05:42:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 05:42:59,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:42:59,799 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] [2022-04-05 05:42:59,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:42:59,800 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:42:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:42:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1443663226, now seen corresponding path program 1 times [2022-04-05 05:42:59,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:42:59,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630940531] [2022-04-05 05:42:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:42:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:42:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:42:59,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:42:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 05:43:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:43:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:00,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630940531] [2022-04-05 05:43:00,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630940531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:00,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510923008] [2022-04-05 05:43:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:00,056 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) [2022-04-05 05:43:00,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:43:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 05:43:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:43:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:43:00,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 05:43:00,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510923008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:43:00,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 05:43:00,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-04-05 05:43:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425051447] [2022-04-05 05:43:00,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:43:00,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:43:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:43:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:43:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:43:00,365 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) [2022-04-05 05:43:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:43:00,388 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-04-05 05:43:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:43:00,388 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 [2022-04-05 05:43:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:43:00,389 INFO L225 Difference]: With dead ends: 136 [2022-04-05 05:43:00,389 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 05:43:00,390 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 [2022-04-05 05:43:00,391 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 [2022-04-05 05:43:00,391 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] [2022-04-05 05:43:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 05:43:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-05 05:43:00,403 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) [2022-04-05 05:43:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-04-05 05:43:00,407 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2022-04-05 05:43:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:43:00,407 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-04-05 05:43:00,407 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) [2022-04-05 05:43:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-04-05 05:43:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 05:43:00,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:43:00,410 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] [2022-04-05 05:43:00,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:43:00,618 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 [2022-04-05 05:43:00,619 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:43:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:43:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1707182856, now seen corresponding path program 1 times [2022-04-05 05:43:00,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:43:00,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093006258] [2022-04-05 05:43:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:43:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:43:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-05 05:43:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:43:00,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:00,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093006258] [2022-04-05 05:43:00,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093006258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:00,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853794686] [2022-04-05 05:43:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:00,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:00,806 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) [2022-04-05 05:43:00,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:43:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 05:43:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:43:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:43:01,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:43:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:43:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853794686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:43:01,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:43:01,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-04-05 05:43:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498806647] [2022-04-05 05:43:01,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:43:01,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 05:43:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:43:01,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 05:43:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:43:01,252 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) [2022-04-05 05:43:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:43:01,748 INFO L93 Difference]: Finished difference Result 150 states and 199 transitions. [2022-04-05 05:43:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 05:43:01,749 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 [2022-04-05 05:43:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:43:01,752 INFO L225 Difference]: With dead ends: 150 [2022-04-05 05:43:01,752 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 05:43:01,755 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 [2022-04-05 05:43:01,757 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 [2022-04-05 05:43:01,758 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] [2022-04-05 05:43:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 05:43:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-04-05 05:43:01,772 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) [2022-04-05 05:43:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-04-05 05:43:01,773 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 48 [2022-04-05 05:43:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:43:01,773 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-04-05 05:43:01,773 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) [2022-04-05 05:43:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-04-05 05:43:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 05:43:01,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:43:01,774 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] [2022-04-05 05:43:01,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:43:01,975 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 [2022-04-05 05:43:01,975 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:43:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:43:01,976 INFO L85 PathProgramCache]: Analyzing trace with hash 126482426, now seen corresponding path program 2 times [2022-04-05 05:43:01,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:43:01,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353288754] [2022-04-05 05:43:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:43:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:43:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:02,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-05 05:43:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:43:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:02,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353288754] [2022-04-05 05:43:02,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353288754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742846421] [2022-04-05 05:43:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:43:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:02,197 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) [2022-04-05 05:43:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:43:02,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:43:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:43:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 05:43:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:43:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 05:43:02,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:43:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:43:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742846421] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:43:02,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:43:02,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-04-05 05:43:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441035961] [2022-04-05 05:43:02,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:43:02,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 05:43:02,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:43:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 05:43:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-04-05 05:43:02,974 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) [2022-04-05 05:43:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:43:03,716 INFO L93 Difference]: Finished difference Result 161 states and 209 transitions. [2022-04-05 05:43:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 05:43:03,716 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 [2022-04-05 05:43:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:43:03,717 INFO L225 Difference]: With dead ends: 161 [2022-04-05 05:43:03,717 INFO L226 Difference]: Without dead ends: 94 [2022-04-05 05:43:03,717 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 [2022-04-05 05:43:03,718 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 [2022-04-05 05:43:03,718 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] [2022-04-05 05:43:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-05 05:43:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-04-05 05:43:03,723 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) [2022-04-05 05:43:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-04-05 05:43:03,723 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 52 [2022-04-05 05:43:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:43:03,724 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-04-05 05:43:03,724 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) [2022-04-05 05:43:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-04-05 05:43:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-05 05:43:03,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:43:03,724 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] [2022-04-05 05:43:03,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:43:03,931 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 [2022-04-05 05:43:03,931 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:43:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:43:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1937541626, now seen corresponding path program 3 times [2022-04-05 05:43:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:43:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315985380] [2022-04-05 05:43:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:43:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:04,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:43:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:04,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 05:43:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:43:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315985380] [2022-04-05 05:43:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315985380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724582395] [2022-04-05 05:43:04,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:43:04,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:04,217 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) [2022-04-05 05:43:04,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:43:04,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:43:04,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:43:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 05:43:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:43:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 05:43:05,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:43:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 05:43:05,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724582395] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:43:05,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:43:05,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2022-04-05 05:43:05,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774898054] [2022-04-05 05:43:05,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:43:05,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 05:43:05,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:43:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 05:43:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-04-05 05:43:05,422 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) [2022-04-05 05:43:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:43:07,345 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2022-04-05 05:43:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 05:43:07,346 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 [2022-04-05 05:43:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:43:07,347 INFO L225 Difference]: With dead ends: 174 [2022-04-05 05:43:07,347 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 05:43:07,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=550, Invalid=1802, Unknown=0, NotChecked=0, Total=2352 [2022-04-05 05:43:07,348 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 [2022-04-05 05:43:07,348 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] [2022-04-05 05:43:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 05:43:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-04-05 05:43:07,356 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) [2022-04-05 05:43:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-04-05 05:43:07,356 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 56 [2022-04-05 05:43:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:43:07,357 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-04-05 05:43:07,357 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) [2022-04-05 05:43:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-04-05 05:43:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 05:43:07,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:43:07,358 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] [2022-04-05 05:43:07,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:43:07,563 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 [2022-04-05 05:43:07,563 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:43:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:43:07,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1713650622, now seen corresponding path program 4 times [2022-04-05 05:43:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:43:07,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488410081] [2022-04-05 05:43:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:07,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:43:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:43:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:07,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:07,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-05 05:43:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:43:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488410081] [2022-04-05 05:43:07,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488410081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606315094] [2022-04-05 05:43:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:43:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:07,852 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) [2022-04-05 05:43:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:43:08,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:43:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:43:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 05:43:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:43:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-05 05:43:08,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:43:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:43:08,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606315094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:43:08,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:43:08,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-04-05 05:43:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163017202] [2022-04-05 05:43:08,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:43:08,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-05 05:43:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:43:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-05 05:43:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-04-05 05:43:08,824 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) [2022-04-05 05:43:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:43:19,183 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2022-04-05 05:43:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 05:43:19,184 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 [2022-04-05 05:43:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:43:19,185 INFO L225 Difference]: With dead ends: 185 [2022-04-05 05:43:19,185 INFO L226 Difference]: Without dead ends: 112 [2022-04-05 05:43:19,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2022-04-05 05:43:19,186 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 153 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-04-05 05:43:19,187 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] [2022-04-05 05:43:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-05 05:43:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-04-05 05:43:19,195 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) [2022-04-05 05:43:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-04-05 05:43:19,195 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 65 [2022-04-05 05:43:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:43:19,196 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-04-05 05:43:19,196 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) [2022-04-05 05:43:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-04-05 05:43:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-05 05:43:19,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:43:19,196 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] [2022-04-05 05:43:19,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:43:19,411 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 [2022-04-05 05:43:19,411 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:43:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:43:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1859967482, now seen corresponding path program 5 times [2022-04-05 05:43:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:43:19,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284346136] [2022-04-05 05:43:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:43:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:43:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:43:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:19,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-05 05:43:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-05 05:43:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:43:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-05 05:43:19,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:43:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284346136] [2022-04-05 05:43:19,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284346136] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:43:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655881999] [2022-04-05 05:43:19,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:43:19,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:43:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:43:19,954 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) [2022-04-05 05:43:19,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process