/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:49:26,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:49:26,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:49:26,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 22:49:26,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 22:49:26,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 22:49:26,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 22:49:26,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 22:49:26,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 22:49:26,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 22:49:26,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 22:49:26,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 22:49:26,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 22:49:26,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 22:49:26,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 22:49:26,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 22:49:26,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 22:49:26,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 22:49:26,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 22:49:26,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 22:49:26,364 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 22:49:26,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 22:49:26,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 22:49:26,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 22:49:26,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 22:49:26,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 22:49:26,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 22:49:26,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 22:49:26,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 22:49:26,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 22:49:26,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:49:26,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:49:26,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:49:26,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:49:26,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:49:26,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:49:26,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:49:26,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:49:26,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:49:26,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:49:26,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:49:26,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:49:26,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:49:26,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:49:26,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:49:26,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:49:26,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:49:26,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:49:26,565 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:49:26,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-03-19 22:49:26,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91c5d54d6/41300b477c2b4f10ba36feed83a8e3c9/FLAG8719847a8 [2022-03-19 22:49:26,951 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:49:26,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-03-19 22:49:26,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91c5d54d6/41300b477c2b4f10ba36feed83a8e3c9/FLAG8719847a8 [2022-03-19 22:49:27,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91c5d54d6/41300b477c2b4f10ba36feed83a8e3c9 [2022-03-19 22:49:27,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:49:27,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:49:27,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:49:27,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:49:27,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:49:27,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49be5132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27, skipping insertion in model container [2022-03-19 22:49:27,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:49:27,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:49:27,605 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] [2022-03-19 22:49:27,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:49:27,753 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:49:27,768 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] [2022-03-19 22:49:27,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:49:27,816 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:49:27,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27 WrapperNode [2022-03-19 22:49:27,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:49:27,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:49:27,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:49:27,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:49:27,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:49:27,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:49:27,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:49:27,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:49:27,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (1/1) ... [2022-03-19 22:49:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:49:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:27,929 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) [2022-03-19 22:49:27,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2022-03-19 22:49:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:49:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-19 22:49:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-03-19 22:49:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:49:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:49:27,979 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 [2022-03-19 22:49:28,147 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:49:28,148 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:49:28,676 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:49:28,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:49:28,682 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 22:49:28,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:49:28 BoogieIcfgContainer [2022-03-19 22:49:28,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:49:28,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:49:28,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:49:28,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:49:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:49:27" (1/3) ... [2022-03-19 22:49:28,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db36b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:49:28, skipping insertion in model container [2022-03-19 22:49:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:49:27" (2/3) ... [2022-03-19 22:49:28,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db36b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:49:28, skipping insertion in model container [2022-03-19 22:49:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:49:28" (3/3) ... [2022-03-19 22:49:28,689 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2022-03-19 22:49:28,693 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:49:28,693 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:49:28,739 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:49:28,744 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 22:49:28,744 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:49:28,756 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) [2022-03-19 22:49:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 22:49:28,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:28,761 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] [2022-03-19 22:49:28,761 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash 467458188, now seen corresponding path program 1 times [2022-03-19 22:49:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:28,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906292642] [2022-03-19 22:49:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:49:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:49:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906292642] [2022-03-19 22:49:29,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906292642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:49:29,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:49:29,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 22:49:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024816897] [2022-03-19 22:49:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:49:29,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 22:49:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 22:49:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:49:29,077 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) [2022-03-19 22:49:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:29,442 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2022-03-19 22:49:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 22:49:29,444 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 [2022-03-19 22:49:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:29,450 INFO L225 Difference]: With dead ends: 227 [2022-03-19 22:49:29,450 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 22:49:29,453 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 [2022-03-19 22:49:29,459 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 [2022-03-19 22:49:29,460 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] [2022-03-19 22:49:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 22:49:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-03-19 22:49:29,488 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) [2022-03-19 22:49:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-03-19 22:49:29,489 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2022-03-19 22:49:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:29,490 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-03-19 22:49:29,490 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) [2022-03-19 22:49:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-03-19 22:49:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 22:49:29,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:29,491 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] [2022-03-19 22:49:29,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:49:29,492 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525110, now seen corresponding path program 1 times [2022-03-19 22:49:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859600168] [2022-03-19 22:49:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:49:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:49:29,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859600168] [2022-03-19 22:49:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859600168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333223233] [2022-03-19 22:49:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:29,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:29,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:29,650 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) [2022-03-19 22:49:29,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:49:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 22:49:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:49:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:49:29,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 22:49:29,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333223233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:49:29,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 22:49:29,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-03-19 22:49:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670800031] [2022-03-19 22:49:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:49:29,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:49:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:49:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 22:49:29,965 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 22:49:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:29,995 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-03-19 22:49:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:49:29,995 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-03-19 22:49:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:29,996 INFO L225 Difference]: With dead ends: 136 [2022-03-19 22:49:29,996 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 22:49:29,997 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 [2022-03-19 22:49:29,998 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 [2022-03-19 22:49:29,998 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] [2022-03-19 22:49:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 22:49:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 22:49:30,004 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) [2022-03-19 22:49:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-03-19 22:49:30,004 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2022-03-19 22:49:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:30,005 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-03-19 22:49:30,005 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 22:49:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-03-19 22:49:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 22:49:30,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:30,006 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] [2022-03-19 22:49:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 22:49:30,224 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 [2022-03-19 22:49:30,224 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1831279328, now seen corresponding path program 1 times [2022-03-19 22:49:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011693260] [2022-03-19 22:49:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:30,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:30,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:30,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:49:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 22:49:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011693260] [2022-03-19 22:49:30,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011693260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969695923] [2022-03-19 22:49:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:30,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:30,376 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) [2022-03-19 22:49:30,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:49:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 22:49:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:49:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 22:49:30,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:49:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 22:49:30,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969695923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:49:30,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:49:30,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-19 22:49:30,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419295046] [2022-03-19 22:49:30,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:49:30,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 22:49:30,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 22:49:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:49:30,882 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) [2022-03-19 22:49:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:31,371 INFO L93 Difference]: Finished difference Result 150 states and 199 transitions. [2022-03-19 22:49:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 22:49:31,372 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 [2022-03-19 22:49:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:31,374 INFO L225 Difference]: With dead ends: 150 [2022-03-19 22:49:31,375 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 22:49:31,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:49:31,380 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 111 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:49:31,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 143 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:49:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 22:49:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-03-19 22:49:31,396 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) [2022-03-19 22:49:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-03-19 22:49:31,398 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 48 [2022-03-19 22:49:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:31,399 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-03-19 22:49:31,400 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) [2022-03-19 22:49:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-03-19 22:49:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 22:49:31,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:31,405 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] [2022-03-19 22:49:31,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 22:49:31,605 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 [2022-03-19 22:49:31,605 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 38283082, now seen corresponding path program 2 times [2022-03-19 22:49:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:31,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771195802] [2022-03-19 22:49:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:31,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:49:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 22:49:31,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771195802] [2022-03-19 22:49:31,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771195802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:31,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12997717] [2022-03-19 22:49:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:49:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:31,868 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) [2022-03-19 22:49:31,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:49:32,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:49:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:49:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 22:49:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:49:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:49:32,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:49:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 22:49:32,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12997717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:49:32,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:49:32,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-03-19 22:49:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329376774] [2022-03-19 22:49:32,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:49:32,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 22:49:32,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 22:49:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-19 22:49:32,636 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) [2022-03-19 22:49:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:33,142 INFO L93 Difference]: Finished difference Result 161 states and 209 transitions. [2022-03-19 22:49:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 22:49:33,142 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 [2022-03-19 22:49:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:33,143 INFO L225 Difference]: With dead ends: 161 [2022-03-19 22:49:33,143 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 22:49:33,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-03-19 22:49:33,144 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 105 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:49:33,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 145 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:49:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 22:49:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-03-19 22:49:33,149 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) [2022-03-19 22:49:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-03-19 22:49:33,150 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 52 [2022-03-19 22:49:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:33,150 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-03-19 22:49:33,150 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) [2022-03-19 22:49:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-03-19 22:49:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 22:49:33,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:33,151 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] [2022-03-19 22:49:33,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:49:33,354 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 [2022-03-19 22:49:33,354 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash -356459190, now seen corresponding path program 3 times [2022-03-19 22:49:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:33,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933848877] [2022-03-19 22:49:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:33,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:49:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 22:49:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933848877] [2022-03-19 22:49:33,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933848877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196539491] [2022-03-19 22:49:33,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:49:33,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:33,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:33,628 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) [2022-03-19 22:49:33,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:49:34,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 22:49:34,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:49:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 22:49:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:49:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 22:49:34,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:49:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 22:49:34,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196539491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:49:34,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:49:34,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2022-03-19 22:49:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586665939] [2022-03-19 22:49:34,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:49:34,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 22:49:34,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:34,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 22:49:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-03-19 22:49:34,772 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) [2022-03-19 22:49:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:36,084 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2022-03-19 22:49:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 22:49:36,085 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 [2022-03-19 22:49:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:36,085 INFO L225 Difference]: With dead ends: 174 [2022-03-19 22:49:36,085 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 22:49:36,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 22:49:36,087 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 131 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:49:36,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 195 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:49:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 22:49:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-03-19 22:49:36,096 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) [2022-03-19 22:49:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-03-19 22:49:36,097 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 56 [2022-03-19 22:49:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:36,097 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-03-19 22:49:36,097 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) [2022-03-19 22:49:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-03-19 22:49:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 22:49:36,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:36,098 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] [2022-03-19 22:49:36,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:49:36,317 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 [2022-03-19 22:49:36,318 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2022236638, now seen corresponding path program 4 times [2022-03-19 22:49:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983451680] [2022-03-19 22:49:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:36,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:49:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 22:49:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983451680] [2022-03-19 22:49:36,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983451680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80333528] [2022-03-19 22:49:36,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:49:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:36,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:36,664 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) [2022-03-19 22:49:36,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:49:36,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:49:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:49:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 22:49:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:49:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 22:49:37,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:49:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 22:49:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80333528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:49:37,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:49:37,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-03-19 22:49:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156341784] [2022-03-19 22:49:37,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:49:37,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 22:49:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:49:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 22:49:37,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-03-19 22:49:37,695 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) [2022-03-19 22:49:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:49:42,181 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2022-03-19 22:49:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 22:49:42,182 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 [2022-03-19 22:49:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:49:42,183 INFO L225 Difference]: With dead ends: 185 [2022-03-19 22:49:42,183 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 22:49:42,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 22:49:42,185 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 155 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:49:42,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 266 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 22:49:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 22:49:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2022-03-19 22:49:42,195 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) [2022-03-19 22:49:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-03-19 22:49:42,196 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 65 [2022-03-19 22:49:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:49:42,196 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-03-19 22:49:42,197 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) [2022-03-19 22:49:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-03-19 22:49:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 22:49:42,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:49:42,197 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] [2022-03-19 22:49:42,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:49:42,414 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 [2022-03-19 22:49:42,415 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:49:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:49:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash 785898314, now seen corresponding path program 5 times [2022-03-19 22:49:42,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:49:42,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000938709] [2022-03-19 22:49:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:49:42,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:49:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:42,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:49:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:42,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:49:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:49:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:49:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 22:49:42,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:49:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000938709] [2022-03-19 22:49:42,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000938709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:49:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814999082] [2022-03-19 22:49:42,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:49:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:49:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:49:42,941 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) [2022-03-19 22:49:42,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process