/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:52:15,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:52:15,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:52:15,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 02:52:15,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 02:52:15,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 02:52:15,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 02:52:15,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 02:52:15,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 02:52:15,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 02:52:15,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 02:52:15,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 02:52:15,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 02:52:15,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 02:52:15,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 02:52:15,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 02:52:15,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 02:52:15,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 02:52:15,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 02:52:15,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 02:52:15,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 02:52:15,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 02:52:15,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 02:52:15,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 02:52:15,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 02:52:15,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 02:52:15,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 02:52:15,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 02:52:15,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 02:52:15,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 02:52:15,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 02:52:15,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 02:52:15,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 02:52:15,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 02:52:15,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 02:52:15,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 02:52:15,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 02:52:15,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 02:52:15,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 02:52:15,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:52:15,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:52:15,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:52:15,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:52:15,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:52:15,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:52:15,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:52:15,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:52:15,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:52:15,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:52:15,634 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:52:15,635 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:52:15,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:52:15,635 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:52:15,635 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:52:15,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:52:15,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:52:15,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:52:15,835 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:52:15,838 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:52:15,839 INFO L432 ainManager$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 02:52:15,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535da0c3c/6609fcddd9854f7ab5eb021f55ef75a9/FLAG0168e4491 [2022-03-19 02:52:16,285 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:52:16,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-03-19 02:52:16,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535da0c3c/6609fcddd9854f7ab5eb021f55ef75a9/FLAG0168e4491 [2022-03-19 02:52:16,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535da0c3c/6609fcddd9854f7ab5eb021f55ef75a9 [2022-03-19 02:52:16,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:52:16,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:52:16,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:52:16,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:52:16,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:52:16,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55de5bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16, skipping insertion in model container [2022-03-19 02:52:16,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:52:16,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:52:16,486 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 02:52:16,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:52:16,573 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:52:16,587 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 02:52:16,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:52:16,641 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:52:16,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16 WrapperNode [2022-03-19 02:52:16,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:52:16,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:52:16,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:52:16,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:52:16,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:52:16,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:52:16,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:52:16,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:52:16,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (1/1) ... [2022-03-19 02:52:16,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:52:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:16,780 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 02:52:16,782 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 02:52:16,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:52:16,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:52:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:52:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:52:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2022-03-19 02:52:16,809 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2022-03-19 02:52:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2022-03-19 02:52:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2022-03-19 02:52:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2022-03-19 02:52:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2022-03-19 02:52:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:52:16,811 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2022-03-19 02:52:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2022-03-19 02:52:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:52:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:52:16,973 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:52:16,974 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:52:17,515 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:52:17,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:52:17,526 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 02:52:17,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:52:17 BoogieIcfgContainer [2022-03-19 02:52:17,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:52:17,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:52:17,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:52:17,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:52:17,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:52:16" (1/3) ... [2022-03-19 02:52:17,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7f0a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:52:17, skipping insertion in model container [2022-03-19 02:52:17,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:52:16" (2/3) ... [2022-03-19 02:52:17,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7f0a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:52:17, skipping insertion in model container [2022-03-19 02:52:17,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:52:17" (3/3) ... [2022-03-19 02:52:17,536 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2022-03-19 02:52:17,540 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:52:17,540 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:52:17,573 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:52:17,584 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 02:52:17,584 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:52:17,594 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 02:52:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 02:52:17,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:17,601 INFO L500 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 02:52:17,601 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash 467458188, now seen corresponding path program 1 times [2022-03-19 02:52:17,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:17,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1389428435] [2022-03-19 02:52:17,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash 467458188, now seen corresponding path program 2 times [2022-03-19 02:52:17,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:17,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497916316] [2022-03-19 02:52:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:17,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:17,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:17,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 02:52:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:17,966 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 02:52:17,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497916316] [2022-03-19 02:52:17,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497916316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:17,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:17,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:52:17,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1389428435] [2022-03-19 02:52:17,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1389428435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:17,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:17,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:52:17,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518055558] [2022-03-19 02:52:17,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:17,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:52:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:52:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:52:17,999 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 02:52:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:18,384 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2022-03-19 02:52:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:52:18,387 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 02:52:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:18,398 INFO L225 Difference]: With dead ends: 227 [2022-03-19 02:52:18,398 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 02:52:18,402 INFO L911 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 02:52:18,404 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 202 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:18,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 141 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:52:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 02:52:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-03-19 02:52:18,450 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 02:52:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-03-19 02:52:18,457 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2022-03-19 02:52:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:18,457 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-03-19 02:52:18,458 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 02:52:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-03-19 02:52:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 02:52:18,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:18,460 INFO L500 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 02:52:18,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:52:18,460 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:18,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525110, now seen corresponding path program 1 times [2022-03-19 02:52:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070113564] [2022-03-19 02:52:18,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525110, now seen corresponding path program 2 times [2022-03-19 02:52:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118073007] [2022-03-19 02:52:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:18,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:18,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 02:52:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:18,659 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 02:52:18,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118073007] [2022-03-19 02:52:18,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118073007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:18,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937438461] [2022-03-19 02:52:18,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:52:18,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:18,661 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 02:52:18,662 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 02:52:19,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:52:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:19,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:52:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:19,262 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 02:52:19,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:52:19,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937438461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:19,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:52:19,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-03-19 02:52:19,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:19,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070113564] [2022-03-19 02:52:19,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070113564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:19,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:19,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:52:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4715154] [2022-03-19 02:52:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:19,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:52:19,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:52:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:52:19,265 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 02:52:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:19,295 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-03-19 02:52:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:52:19,296 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 02:52:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:19,297 INFO L225 Difference]: With dead ends: 136 [2022-03-19 02:52:19,297 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 02:52:19,297 INFO L911 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 02:52:19,298 INFO L912 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 02:52:19,298 INFO L913 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 02:52:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 02:52:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 02:52:19,306 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 02:52:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-03-19 02:52:19,306 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2022-03-19 02:52:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:19,306 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-03-19 02:52:19,307 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 02:52:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-03-19 02:52:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 02:52:19,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:19,308 INFO L500 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 02:52:19,328 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 02:52:19,508 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 02:52:19,508 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1831279328, now seen corresponding path program 1 times [2022-03-19 02:52:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712036953] [2022-03-19 02:52:19,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1831279328, now seen corresponding path program 2 times [2022-03-19 02:52:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933286852] [2022-03-19 02:52:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:19,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 02:52:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:19,703 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 02:52:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933286852] [2022-03-19 02:52:19,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933286852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182717692] [2022-03-19 02:52:19,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:52:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:19,705 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 02:52:19,706 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 02:52:20,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:52:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 02:52:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:52:20,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:20,420 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 02:52:20,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182717692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:20,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:20,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-19 02:52:20,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712036953] [2022-03-19 02:52:20,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712036953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:20,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:20,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:52:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557508823] [2022-03-19 02:52:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:20,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:52:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:52:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:52:20,422 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:20,736 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2022-03-19 02:52:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:52:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-03-19 02:52:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:20,738 INFO L225 Difference]: With dead ends: 142 [2022-03-19 02:52:20,738 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 02:52:20,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:52:20,739 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:20,739 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:52:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 02:52:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-03-19 02:52:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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 02:52:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-03-19 02:52:20,746 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 48 [2022-03-19 02:52:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:20,747 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-03-19 02:52:20,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-03-19 02:52:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 02:52:20,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:20,747 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:52:20,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 02:52:20,968 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 02:52:20,969 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -110265974, now seen corresponding path program 3 times [2022-03-19 02:52:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185788739] [2022-03-19 02:52:20,970 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash -110265974, now seen corresponding path program 4 times [2022-03-19 02:52:20,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589845638] [2022-03-19 02:52:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:21,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:21,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 02:52:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:52:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589845638] [2022-03-19 02:52:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589845638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130249720] [2022-03-19 02:52:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:52:21,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:21,205 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 02:52:21,206 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 02:52:21,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:52:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:52:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:52:21,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:52:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130249720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:21,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:21,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-03-19 02:52:21,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185788739] [2022-03-19 02:52:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185788739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:21,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:21,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:52:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758695962] [2022-03-19 02:52:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:21,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:52:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:52:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:52:21,699 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:22,029 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-03-19 02:52:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:52:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-19 02:52:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:22,030 INFO L225 Difference]: With dead ends: 144 [2022-03-19 02:52:22,030 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 02:52:22,031 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:52:22,032 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:22,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 160 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:52:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 02:52:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-03-19 02:52:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 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 02:52:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-03-19 02:52:22,041 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 50 [2022-03-19 02:52:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:22,041 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-03-19 02:52:22,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-03-19 02:52:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 02:52:22,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:22,042 INFO L500 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 02:52:22,077 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 02:52:22,259 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 02:52:22,260 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash -523287008, now seen corresponding path program 5 times [2022-03-19 02:52:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:22,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675467513] [2022-03-19 02:52:22,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash -523287008, now seen corresponding path program 6 times [2022-03-19 02:52:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:22,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287969214] [2022-03-19 02:52:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:22,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:22,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:22,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 02:52:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 02:52:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287969214] [2022-03-19 02:52:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287969214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267175456] [2022-03-19 02:52:22,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:52:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:22,432 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 02:52:22,433 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 02:52:23,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 02:52:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 02:52:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 02:52:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 02:52:23,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267175456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:23,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:23,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-19 02:52:23,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:23,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675467513] [2022-03-19 02:52:23,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675467513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:23,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:23,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:52:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112830839] [2022-03-19 02:52:23,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:23,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:52:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:52:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-19 02:52:23,990 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:24,323 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2022-03-19 02:52:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:52:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-19 02:52:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:24,326 INFO L225 Difference]: With dead ends: 146 [2022-03-19 02:52:24,326 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 02:52:24,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:52:24,330 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:24,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:52:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 02:52:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-19 02:52:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 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 02:52:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-03-19 02:52:24,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2022-03-19 02:52:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:24,338 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-03-19 02:52:24,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-03-19 02:52:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 02:52:24,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:24,340 INFO L500 BasicCegarLoop]: trace histogram [8, 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 02:52:24,365 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 02:52:24,563 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 [2022-03-19 02:52:24,563 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1966742966, now seen corresponding path program 7 times [2022-03-19 02:52:24,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008322120] [2022-03-19 02:52:24,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1966742966, now seen corresponding path program 8 times [2022-03-19 02:52:24,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499158818] [2022-03-19 02:52:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:24,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:24,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:24,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 02:52:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:52:24,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499158818] [2022-03-19 02:52:24,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499158818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439478281] [2022-03-19 02:52:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:52:24,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:24,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:24,745 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 02:52:24,765 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 02:52:25,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:52:25,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:52:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 02:52:25,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:52:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439478281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:25,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:25,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-19 02:52:25,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:25,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008322120] [2022-03-19 02:52:25,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008322120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:25,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:25,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:52:25,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623891751] [2022-03-19 02:52:25,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:25,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:52:25,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:52:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:52:25,843 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:26,339 INFO L93 Difference]: Finished difference Result 148 states and 192 transitions. [2022-03-19 02:52:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:52:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-19 02:52:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:26,342 INFO L225 Difference]: With dead ends: 148 [2022-03-19 02:52:26,342 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 02:52:26,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:52:26,343 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:26,343 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:52:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 02:52:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-03-19 02:52:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 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 02:52:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-03-19 02:52:26,350 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 54 [2022-03-19 02:52:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:26,350 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-03-19 02:52:26,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-03-19 02:52:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 02:52:26,352 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:26,352 INFO L500 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 02:52:26,372 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 02:52:26,567 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 02:52:26,567 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -127655584, now seen corresponding path program 9 times [2022-03-19 02:52:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535338378] [2022-03-19 02:52:26,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -127655584, now seen corresponding path program 10 times [2022-03-19 02:52:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:26,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258698790] [2022-03-19 02:52:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:26,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:26,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 02:52:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 02:52:26,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:26,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258698790] [2022-03-19 02:52:26,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258698790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:26,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204078327] [2022-03-19 02:52:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:52:26,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:26,767 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 02:52:26,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 02:52:26,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:52:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 02:52:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 02:52:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 02:52:27,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204078327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:27,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:27,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-19 02:52:27,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535338378] [2022-03-19 02:52:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535338378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:27,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:27,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:52:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137980649] [2022-03-19 02:52:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:27,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:52:27,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:52:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:52:27,421 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:27,833 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2022-03-19 02:52:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:52:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-03-19 02:52:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:27,835 INFO L225 Difference]: With dead ends: 150 [2022-03-19 02:52:27,835 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 02:52:27,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:52:27,836 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:27,836 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:52:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 02:52:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-03-19 02:52:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 02:52:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-03-19 02:52:27,842 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-03-19 02:52:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:27,842 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-03-19 02:52:27,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-03-19 02:52:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 02:52:27,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:27,843 INFO L500 BasicCegarLoop]: trace histogram [12, 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 02:52:27,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 02:52:28,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:28,065 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:28,065 INFO L85 PathProgramCache]: Analyzing trace with hash -330196214, now seen corresponding path program 11 times [2022-03-19 02:52:28,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:28,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916441623] [2022-03-19 02:52:28,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:28,066 INFO L85 PathProgramCache]: Analyzing trace with hash -330196214, now seen corresponding path program 12 times [2022-03-19 02:52:28,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:28,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582615675] [2022-03-19 02:52:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:28,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:28,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:28,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 02:52:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 02:52:28,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582615675] [2022-03-19 02:52:28,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582615675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:28,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506487239] [2022-03-19 02:52:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:52:28,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:28,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:28,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:28,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 02:52:31,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:52:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 02:52:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 02:52:32,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 02:52:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506487239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:32,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:32,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 23 [2022-03-19 02:52:32,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:32,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916441623] [2022-03-19 02:52:32,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916441623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:32,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:32,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:52:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906896421] [2022-03-19 02:52:32,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:32,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:52:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:52:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:52:32,346 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:32,814 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2022-03-19 02:52:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:52:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-03-19 02:52:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:32,816 INFO L225 Difference]: With dead ends: 152 [2022-03-19 02:52:32,816 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 02:52:32,816 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:52:32,817 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:32,817 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:52:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 02:52:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-03-19 02:52:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 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 02:52:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-03-19 02:52:32,827 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 58 [2022-03-19 02:52:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:32,827 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-03-19 02:52:32,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-03-19 02:52:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 02:52:32,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:32,828 INFO L500 BasicCegarLoop]: trace histogram [14, 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 02:52:32,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 02:52:33,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:33,028 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1036407648, now seen corresponding path program 13 times [2022-03-19 02:52:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019874880] [2022-03-19 02:52:33,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1036407648, now seen corresponding path program 14 times [2022-03-19 02:52:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832536408] [2022-03-19 02:52:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:33,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:33,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 02:52:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 02:52:33,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832536408] [2022-03-19 02:52:33,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832536408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470934203] [2022-03-19 02:52:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:52:33,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:33,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:33,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 02:52:33,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:52:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 02:52:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 105 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 02:52:34,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 02:52:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470934203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:34,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-03-19 02:52:34,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:34,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019874880] [2022-03-19 02:52:34,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019874880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:34,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:52:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475538064] [2022-03-19 02:52:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:34,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:52:34,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:52:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:52:34,557 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:35,094 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-03-19 02:52:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:52:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-03-19 02:52:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:35,095 INFO L225 Difference]: With dead ends: 154 [2022-03-19 02:52:35,095 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 02:52:35,096 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:52:35,096 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:35,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:52:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 02:52:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-03-19 02:52:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 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 02:52:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-03-19 02:52:35,104 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 60 [2022-03-19 02:52:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:35,104 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-03-19 02:52:35,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-03-19 02:52:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 02:52:35,105 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:35,105 INFO L500 BasicCegarLoop]: trace histogram [16, 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 02:52:35,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 02:52:35,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 02:52:35,312 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2059623478, now seen corresponding path program 15 times [2022-03-19 02:52:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:35,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [299946886] [2022-03-19 02:52:35,313 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2059623478, now seen corresponding path program 16 times [2022-03-19 02:52:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:35,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751062031] [2022-03-19 02:52:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:35,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:35,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:35,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 02:52:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 02:52:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751062031] [2022-03-19 02:52:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751062031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134709874] [2022-03-19 02:52:35,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:52:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:35,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:35,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 02:52:35,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:52:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 02:52:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 11 proven. 136 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:52:36,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 02:52:36,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134709874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:36,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:36,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 33 [2022-03-19 02:52:36,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [299946886] [2022-03-19 02:52:36,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [299946886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:36,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:36,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:52:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631012225] [2022-03-19 02:52:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:36,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:52:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:52:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:52:36,755 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:37,361 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2022-03-19 02:52:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:52:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-03-19 02:52:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:37,362 INFO L225 Difference]: With dead ends: 156 [2022-03-19 02:52:37,362 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 02:52:37,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 02:52:37,363 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:37,364 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:52:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 02:52:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2022-03-19 02:52:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 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 02:52:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-03-19 02:52:37,369 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 62 [2022-03-19 02:52:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:37,369 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-03-19 02:52:37,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-03-19 02:52:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 02:52:37,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:37,370 INFO L500 BasicCegarLoop]: trace histogram [18, 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 02:52:37,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:52:37,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 02:52:37,591 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1482430496, now seen corresponding path program 17 times [2022-03-19 02:52:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:37,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139788290] [2022-03-19 02:52:37,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1482430496, now seen corresponding path program 18 times [2022-03-19 02:52:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:37,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901677907] [2022-03-19 02:52:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:37,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:37,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 02:52:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 02:52:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901677907] [2022-03-19 02:52:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901677907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002527205] [2022-03-19 02:52:37,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:52:37,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:37,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:37,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 02:52:40,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 02:52:40,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 02:52:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 02:52:40,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 02:52:40,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002527205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:40,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:40,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-03-19 02:52:40,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139788290] [2022-03-19 02:52:40,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139788290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:40,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:40,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:52:40,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038892677] [2022-03-19 02:52:40,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:40,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:52:40,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:52:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 02:52:40,858 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:41,695 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-03-19 02:52:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:52:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-03-19 02:52:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:41,696 INFO L225 Difference]: With dead ends: 158 [2022-03-19 02:52:41,696 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 02:52:41,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=494, Invalid=1762, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:52:41,697 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:41,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 279 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:52:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 02:52:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-03-19 02:52:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 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 02:52:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-03-19 02:52:41,702 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 64 [2022-03-19 02:52:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:41,702 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-03-19 02:52:41,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-03-19 02:52:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 02:52:41,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:41,703 INFO L500 BasicCegarLoop]: trace histogram [20, 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 02:52:41,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 02:52:41,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 02:52:41,911 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1102249098, now seen corresponding path program 19 times [2022-03-19 02:52:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:41,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240281106] [2022-03-19 02:52:41,911 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1102249098, now seen corresponding path program 20 times [2022-03-19 02:52:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461592189] [2022-03-19 02:52:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:41,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:41,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 02:52:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 02:52:42,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461592189] [2022-03-19 02:52:42,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461592189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463539355] [2022-03-19 02:52:42,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:52:42,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:42,237 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:42,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 02:52:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:52:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 02:52:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 13 proven. 210 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:52:43,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 123 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 02:52:43,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463539355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:43,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-03-19 02:52:43,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:43,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240281106] [2022-03-19 02:52:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240281106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:43,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:43,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:52:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552544975] [2022-03-19 02:52:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:43,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:52:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:52:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 02:52:43,697 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:44,601 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2022-03-19 02:52:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:52:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-03-19 02:52:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:44,602 INFO L225 Difference]: With dead ends: 160 [2022-03-19 02:52:44,602 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 02:52:44,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=575, Invalid=2077, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:52:44,603 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:44,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:52:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 02:52:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-03-19 02:52:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 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 02:52:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-03-19 02:52:44,610 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 66 [2022-03-19 02:52:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:44,610 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-03-19 02:52:44,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-03-19 02:52:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 02:52:44,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:44,610 INFO L500 BasicCegarLoop]: trace histogram [22, 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 02:52:44,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 02:52:44,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 02:52:44,831 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1393110240, now seen corresponding path program 21 times [2022-03-19 02:52:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592505738] [2022-03-19 02:52:44,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1393110240, now seen corresponding path program 22 times [2022-03-19 02:52:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:44,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978029605] [2022-03-19 02:52:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:44,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:44,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 02:52:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-19 02:52:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978029605] [2022-03-19 02:52:45,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978029605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291826536] [2022-03-19 02:52:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:52:45,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:45,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:45,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:45,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 02:52:45,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:52:45,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:52:45,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 02:52:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:52:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 14 proven. 253 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 02:52:45,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:52:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 146 proven. 66 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-03-19 02:52:46,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291826536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:52:46,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:52:46,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-03-19 02:52:46,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:52:46,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592505738] [2022-03-19 02:52:46,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592505738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:52:46,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:52:46,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:52:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179268749] [2022-03-19 02:52:46,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:52:46,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:52:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:52:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:52:46,993 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:52:47,941 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2022-03-19 02:52:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:52:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-03-19 02:52:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:52:47,942 INFO L225 Difference]: With dead ends: 162 [2022-03-19 02:52:47,942 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 02:52:47,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=664, Invalid=2416, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 02:52:47,943 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:52:47,944 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 245 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:52:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 02:52:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-19 02:52:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 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 02:52:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2022-03-19 02:52:47,949 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 68 [2022-03-19 02:52:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:52:47,949 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2022-03-19 02:52:47,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:52:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2022-03-19 02:52:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 02:52:47,949 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:52:47,949 INFO L500 BasicCegarLoop]: trace histogram [24, 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 02:52:47,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 02:52:48,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 02:52:48,163 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:52:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:52:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1390454090, now seen corresponding path program 23 times [2022-03-19 02:52:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:52:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860773116] [2022-03-19 02:52:48,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:52:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1390454090, now seen corresponding path program 24 times [2022-03-19 02:52:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:52:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970810066] [2022-03-19 02:52:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:52:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:52:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:52:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:48,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:52:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:48,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 02:52:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:52:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 02:52:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:52:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970810066] [2022-03-19 02:52:48,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970810066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:52:48,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544114717] [2022-03-19 02:52:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:52:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:52:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:52:48,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:52:48,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 02:53:19,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 02:53:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:53:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 02:53:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 172 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 02:53:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-03-19 02:53:21,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544114717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:21,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:21,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 46 [2022-03-19 02:53:21,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860773116] [2022-03-19 02:53:21,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860773116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:21,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:21,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:53:21,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35870352] [2022-03-19 02:53:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:21,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:53:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:53:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 02:53:21,315 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:22,311 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2022-03-19 02:53:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:53:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-03-19 02:53:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:22,312 INFO L225 Difference]: With dead ends: 164 [2022-03-19 02:53:22,312 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 02:53:22,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=756, Invalid=2904, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:53:22,313 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:22,313 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 228 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:53:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 02:53:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-03-19 02:53:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 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 02:53:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2022-03-19 02:53:22,318 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 70 [2022-03-19 02:53:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:22,318 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2022-03-19 02:53:22,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2022-03-19 02:53:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 02:53:22,319 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:22,319 INFO L500 BasicCegarLoop]: trace histogram [26, 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 02:53:22,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:22,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 02:53:22,535 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1316589984, now seen corresponding path program 25 times [2022-03-19 02:53:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038862838] [2022-03-19 02:53:22,537 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:53:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1316589984, now seen corresponding path program 26 times [2022-03-19 02:53:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:22,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922419922] [2022-03-19 02:53:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:22,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:22,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:53:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 02:53:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 02:53:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:23,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922419922] [2022-03-19 02:53:23,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922419922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:23,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818740608] [2022-03-19 02:53:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:53:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:23,031 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:23,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 02:53:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:53:23,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:53:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 02:53:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 199 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 02:53:24,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-03-19 02:53:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818740608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:25,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:25,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2022-03-19 02:53:25,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038862838] [2022-03-19 02:53:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038862838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:25,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:25,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:53:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691237094] [2022-03-19 02:53:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:25,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:53:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:53:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1729, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:53:25,180 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:26,511 INFO L93 Difference]: Finished difference Result 166 states and 210 transitions. [2022-03-19 02:53:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:53:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-03-19 02:53:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:26,512 INFO L225 Difference]: With dead ends: 166 [2022-03-19 02:53:26,512 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 02:53:26,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=836, Invalid=3196, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 02:53:26,514 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:26,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 313 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:53:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 02:53:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-03-19 02:53:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 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 02:53:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-03-19 02:53:26,519 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 72 [2022-03-19 02:53:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:26,520 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-03-19 02:53:26,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-03-19 02:53:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 02:53:26,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:26,520 INFO L500 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 02:53:26,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:26,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:26,721 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -286155254, now seen corresponding path program 27 times [2022-03-19 02:53:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906237273] [2022-03-19 02:53:26,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:53:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -286155254, now seen corresponding path program 28 times [2022-03-19 02:53:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200772212] [2022-03-19 02:53:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:26,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:53:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 02:53:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 332 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 02:53:27,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200772212] [2022-03-19 02:53:27,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200772212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46893484] [2022-03-19 02:53:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:53:27,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:27,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:27,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 02:53:27,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:53:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:53:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 02:53:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 228 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 02:53:28,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 332 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 02:53:29,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46893484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:29,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:29,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 51 [2022-03-19 02:53:29,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906237273] [2022-03-19 02:53:29,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906237273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:29,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:29,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:53:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365086220] [2022-03-19 02:53:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:29,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:53:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:53:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 02:53:29,946 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:31,475 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2022-03-19 02:53:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:53:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-03-19 02:53:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:31,480 INFO L225 Difference]: With dead ends: 168 [2022-03-19 02:53:31,480 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 02:53:31,483 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=928, Invalid=3628, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 02:53:31,484 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:31,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 330 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 02:53:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 02:53:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-19 02:53:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 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 02:53:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-03-19 02:53:31,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 74 [2022-03-19 02:53:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:31,489 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-03-19 02:53:31,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:53:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-03-19 02:53:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 02:53:31,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:31,490 INFO L500 BasicCegarLoop]: trace histogram [30, 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 02:53:31,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:31,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 02:53:31,699 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1348028000, now seen corresponding path program 29 times [2022-03-19 02:53:31,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [788426929] [2022-03-19 02:53:31,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:53:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1348028000, now seen corresponding path program 30 times [2022-03-19 02:53:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:31,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660624478] [2022-03-19 02:53:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:31,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:53:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:32,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 02:53:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-19 02:53:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:32,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660624478] [2022-03-19 02:53:32,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660624478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:32,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283532459] [2022-03-19 02:53:32,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:53:32,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:32,406 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:32,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 02:54:02,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 02:54:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:54:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 02:54:02,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 259 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 02:54:03,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-19 02:54:04,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283532459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:04,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:04,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 19] total 55 [2022-03-19 02:54:04,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:04,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [788426929] [2022-03-19 02:54:04,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [788426929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:04,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:04,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:54:04,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445985538] [2022-03-19 02:54:04,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:04,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:54:04,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:54:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2334, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:54:04,619 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:05,847 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2022-03-19 02:54:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 02:54:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2022-03-19 02:54:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:05,848 INFO L225 Difference]: With dead ends: 170 [2022-03-19 02:54:05,848 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 02:54:05,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=990, Invalid=4266, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 02:54:05,853 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:05,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:54:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 02:54:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-19 02:54:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 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 02:54:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-03-19 02:54:05,879 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 76 [2022-03-19 02:54:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:05,879 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-03-19 02:54:05,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-03-19 02:54:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 02:54:05,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:05,881 INFO L500 BasicCegarLoop]: trace histogram [32, 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 02:54:05,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-19 02:54:06,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 02:54:06,081 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 286385866, now seen corresponding path program 31 times [2022-03-19 02:54:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [990347405] [2022-03-19 02:54:06,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:54:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 286385866, now seen corresponding path program 32 times [2022-03-19 02:54:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374774540] [2022-03-19 02:54:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:06,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:54:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 02:54:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-03-19 02:54:06,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374774540] [2022-03-19 02:54:06,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374774540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449181851] [2022-03-19 02:54:06,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:54:06,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:06,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:06,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 02:54:07,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:54:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:54:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 02:54:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 292 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 02:54:08,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-03-19 02:54:10,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449181851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:10,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:10,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2022-03-19 02:54:10,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [990347405] [2022-03-19 02:54:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [990347405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:10,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:10,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:54:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283258618] [2022-03-19 02:54:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:10,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:54:10,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:54:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=2461, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 02:54:10,647 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:12,718 INFO L93 Difference]: Finished difference Result 172 states and 216 transitions. [2022-03-19 02:54:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:54:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-03-19 02:54:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:12,719 INFO L225 Difference]: With dead ends: 172 [2022-03-19 02:54:12,719 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 02:54:12,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1146, Invalid=4554, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 02:54:12,721 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:12,721 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 398 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:54:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 02:54:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-03-19 02:54:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 75 states have internal predecessors, (92), 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 02:54:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-03-19 02:54:12,726 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 78 [2022-03-19 02:54:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:12,726 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-03-19 02:54:12,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-03-19 02:54:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 02:54:12,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:12,727 INFO L500 BasicCegarLoop]: trace histogram [34, 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 02:54:12,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:12,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 02:54:12,944 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash -55855904, now seen corresponding path program 33 times [2022-03-19 02:54:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497377810] [2022-03-19 02:54:12,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:54:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash -55855904, now seen corresponding path program 34 times [2022-03-19 02:54:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705292597] [2022-03-19 02:54:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:54:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 02:54:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 479 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 02:54:13,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:13,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705292597] [2022-03-19 02:54:13,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705292597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:13,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369940227] [2022-03-19 02:54:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:54:13,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:13,900 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 02:54:14,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:54:14,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:54:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 02:54:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:14,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 02:54:15,139 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-19 02:54:15,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-03-19 02:54:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 327 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-19 02:54:15,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:15,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-19 02:54:15,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-19 02:54:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 479 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 02:54:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369940227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:16,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 61 [2022-03-19 02:54:16,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:16,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497377810] [2022-03-19 02:54:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497377810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:16,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 02:54:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738257075] [2022-03-19 02:54:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:16,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 02:54:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 02:54:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3474, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:54:16,405 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:19,313 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-03-19 02:54:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:54:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 80 [2022-03-19 02:54:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:19,315 INFO L225 Difference]: With dead ends: 174 [2022-03-19 02:54:19,315 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 02:54:19,315 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=335, Invalid=6145, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 02:54:19,316 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:19,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 398 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:54:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 02:54:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-03-19 02:54:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 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 02:54:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-03-19 02:54:19,322 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 80 [2022-03-19 02:54:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:19,322 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-03-19 02:54:19,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 02:54:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-03-19 02:54:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 02:54:19,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:19,323 INFO L500 BasicCegarLoop]: trace histogram [36, 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 02:54:19,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:19,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:19,523 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 963477386, now seen corresponding path program 35 times [2022-03-19 02:54:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:19,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769257721] [2022-03-19 02:54:19,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:54:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 963477386, now seen corresponding path program 36 times [2022-03-19 02:54:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:19,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491742280] [2022-03-19 02:54:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 02:54:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:20,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 02:54:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 02:54:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491742280] [2022-03-19 02:54:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491742280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120186115] [2022-03-19 02:54:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:54:20,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:20,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:20,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 03:05:28,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 03:05:28,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:05:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 03:05:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:05:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 364 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-19 03:05:30,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:05:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 03:05:32,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120186115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:05:32,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:05:32,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 63 [2022-03-19 03:05:32,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:05:32,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769257721] [2022-03-19 03:05:32,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769257721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:05:32,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:05:32,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 03:05:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118420487] [2022-03-19 03:05:32,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:05:32,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 03:05:32,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:05:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 03:05:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=3149, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 03:05:32,108 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:05:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:05:34,203 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2022-03-19 03:05:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 03:05:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 82 [2022-03-19 03:05:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:05:34,204 INFO L225 Difference]: With dead ends: 176 [2022-03-19 03:05:34,204 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 03:05:34,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1180, Invalid=5792, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 03:05:34,205 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:05:34,206 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:05:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 03:05:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-03-19 03:05:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 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 03:05:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-03-19 03:05:34,212 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 82 [2022-03-19 03:05:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:05:34,212 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-03-19 03:05:34,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:05:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-03-19 03:05:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 03:05:34,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:05:34,212 INFO L500 BasicCegarLoop]: trace histogram [38, 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 03:05:34,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 03:05:34,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:05:34,428 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:05:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:05:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1997971424, now seen corresponding path program 37 times [2022-03-19 03:05:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:05:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2015226460] [2022-03-19 03:05:34,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:05:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1997971424, now seen corresponding path program 38 times [2022-03-19 03:05:34,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:05:34,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349872938] [2022-03-19 03:05:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:05:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:05:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:05:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:34,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 03:05:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:35,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 03:05:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-19 03:05:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:05:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349872938] [2022-03-19 03:05:35,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349872938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:05:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406661826] [2022-03-19 03:05:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:05:35,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:05:35,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:05:35,867 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:05:35,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 03:05:36,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:05:36,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:05:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:05:36,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:05:37,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 03:05:37,645 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 03:05:37,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 03:05:37,740 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 03:05:37,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 03:05:37,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 03:05:38,000 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 03:05:38,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-03-19 03:05:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 404 proven. 189 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-19 03:05:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:05:38,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-03-19 03:05:38,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-03-19 03:05:38,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 318 [2022-03-19 03:05:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-19 03:05:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406661826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:05:39,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:05:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 68 [2022-03-19 03:05:39,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:05:39,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2015226460] [2022-03-19 03:05:39,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2015226460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:05:39,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:05:39,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:05:39,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362470794] [2022-03-19 03:05:39,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:05:39,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:05:39,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:05:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:05:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4341, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 03:05:39,999 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:05:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:05:43,422 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2022-03-19 03:05:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 03:05:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 84 [2022-03-19 03:05:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:05:43,423 INFO L225 Difference]: With dead ends: 178 [2022-03-19 03:05:43,423 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 03:05:43,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=376, Invalid=7634, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 03:05:43,425 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:05:43,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 03:05:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 03:05:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-03-19 03:05:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 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 03:05:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-03-19 03:05:43,431 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 84 [2022-03-19 03:05:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:05:43,431 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-03-19 03:05:43,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:05:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-03-19 03:05:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 03:05:43,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:05:43,432 INFO L500 BasicCegarLoop]: trace histogram [40, 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 03:05:43,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 03:05:43,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 03:05:43,632 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:05:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:05:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash 758147146, now seen corresponding path program 39 times [2022-03-19 03:05:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:05:43,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076936394] [2022-03-19 03:05:43,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:05:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 758147146, now seen corresponding path program 40 times [2022-03-19 03:05:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:05:43,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030617462] [2022-03-19 03:05:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:05:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:05:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:43,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:05:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 03:05:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 03:05:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:05:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 653 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-03-19 03:05:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:05:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030617462] [2022-03-19 03:05:45,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030617462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:05:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246443337] [2022-03-19 03:05:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:05:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:05:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:05:45,256 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:05:45,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 03:05:45,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:05:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:05:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 03:05:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:05:46,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 03:05:46,880 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 03:05:46,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 03:05:47,018 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 03:05:47,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 03:05:47,158 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 03:05:47,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 03:05:47,420 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-19 03:05:47,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-03-19 03:05:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 447 proven. 207 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 03:05:47,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:05:54,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-03-19 03:05:54,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10862 treesize of output 10734