/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:48:51,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:48:51,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:48:51,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:48:51,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:48:51,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:48:51,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:48:51,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:48:51,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:48:51,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:48:51,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:48:51,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:48:51,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:48:51,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:48:51,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:48:51,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:48:51,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:48:51,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:48:51,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:48:51,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:48:51,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:48:51,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:48:51,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:48:51,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:48:51,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:48:51,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:48:51,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:48:51,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:48:51,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:48:51,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:48:51,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:48:51,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:48:51,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:48:51,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:48:51,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:48:51,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:48:51,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:48:51,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:48:51,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:48:51,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:48:51,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:48:51,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:48:51,648 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:48:51,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:48:51,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:48:51,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:48:51,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:48:51,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:48:51,650 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:48:51,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:48:51,651 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:48:51,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:48:51,651 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:48:51,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:48:51,652 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:48:51,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:48:51,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:48:51,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:48:51,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:48:51,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:48:51,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:48:51,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:48:51,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:48:51,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:48:51,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:48:51,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:48:51,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:48:51,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:48:51,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:48:51,942 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:48:51,943 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:48:51,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/splice-2.i [2023-04-01 04:48:53,111 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:48:53,357 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:48:53,358 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/splice-2.i [2023-04-01 04:48:53,373 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a4df1de/08809c688acf4e53884cb1d7d4190b49/FLAG9dcda7a32 [2023-04-01 04:48:53,384 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a4df1de/08809c688acf4e53884cb1d7d4190b49 [2023-04-01 04:48:53,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:48:53,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:48:53,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:48:53,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:48:53,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:48:53,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7483ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53, skipping insertion in model container [2023-04-01 04:48:53,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:48:53,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:48:53,688 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2023-04-01 04:48:53,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:48:53,702 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:48:53,744 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/splice-2.i[23721,23734] [2023-04-01 04:48:53,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:48:53,777 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:48:53,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53 WrapperNode [2023-04-01 04:48:53,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:48:53,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:48:53,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:48:53,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:48:53,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,827 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:48:53,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:48:53,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:48:53,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:48:53,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (1/1) ... [2023-04-01 04:48:53,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:48:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:48:53,866 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) [2023-04-01 04:48:53,869 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 [2023-04-01 04:48:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:48:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:48:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:48:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:48:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:48:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:48:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:48:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:48:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2023-04-01 04:48:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:48:53,901 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:48:53,902 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:48:53,902 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:48:53,902 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:48:53,902 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:48:53,902 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:48:53,903 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:48:53,904 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:48:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:48:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:48:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:48:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:48:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:48:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:48:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:48:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:48:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:48:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:48:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:48:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:48:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:48:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:48:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:48:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:48:53,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:48:54,204 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:48:54,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:48:54,252 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:48:54,447 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:48:54,499 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:48:54,499 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 04:48:54,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:48:54 BoogieIcfgContainer [2023-04-01 04:48:54,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:48:54,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:48:54,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:48:54,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:48:54,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:48:53" (1/3) ... [2023-04-01 04:48:54,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eeaa959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:48:54, skipping insertion in model container [2023-04-01 04:48:54,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:48:53" (2/3) ... [2023-04-01 04:48:54,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eeaa959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:48:54, skipping insertion in model container [2023-04-01 04:48:54,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:48:54" (3/3) ... [2023-04-01 04:48:54,510 INFO L112 eAbstractionObserver]: Analyzing ICFG splice-2.i [2023-04-01 04:48:54,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:48:54,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:48:54,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:48:54,577 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b1c65ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:48:54,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:48:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:48:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:48:54,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:54,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:54,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:54,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:54,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1124720447, now seen corresponding path program 1 times [2023-04-01 04:48:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:54,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424372668] [2023-04-01 04:48:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:54,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424372668] [2023-04-01 04:48:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424372668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:54,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:48:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:48:54,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479245738] [2023-04-01 04:48:54,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:48:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:48:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:48:54,801 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:54,851 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2023-04-01 04:48:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:48:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 04:48:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:54,859 INFO L225 Difference]: With dead ends: 45 [2023-04-01 04:48:54,859 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 04:48:54,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:48:54,869 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:54,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:48:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 04:48:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 04:48:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 04:48:54,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-04-01 04:48:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:54,905 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 04:48:54,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 04:48:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:48:54,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:54,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:54,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:48:54,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:54,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1115106825, now seen corresponding path program 1 times [2023-04-01 04:48:54,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:54,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806422341] [2023-04-01 04:48:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:55,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806422341] [2023-04-01 04:48:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806422341] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:48:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:48:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798724033] [2023-04-01 04:48:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:55,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:48:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:48:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:48:55,151 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:55,218 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-04-01 04:48:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:48:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 04:48:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:55,219 INFO L225 Difference]: With dead ends: 40 [2023-04-01 04:48:55,219 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 04:48:55,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:48:55,221 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:55,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:48:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 04:48:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2023-04-01 04:48:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-01 04:48:55,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2023-04-01 04:48:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:55,227 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-01 04:48:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-01 04:48:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:48:55,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:55,228 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:48:55,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:55,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1943122328, now seen corresponding path program 1 times [2023-04-01 04:48:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69275849] [2023-04-01 04:48:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:48:55,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69275849] [2023-04-01 04:48:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69275849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:55,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:48:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:48:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632917790] [2023-04-01 04:48:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:48:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:48:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:48:55,341 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:55,405 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-01 04:48:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:48:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:48:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:55,408 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:48:55,408 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 04:48:55,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:48:55,410 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:55,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:48:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 04:48:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-04-01 04:48:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-01 04:48:55,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 21 [2023-04-01 04:48:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:55,415 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-01 04:48:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-01 04:48:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:48:55,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:55,416 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:48:55,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:55,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -105507830, now seen corresponding path program 1 times [2023-04-01 04:48:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:55,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582925546] [2023-04-01 04:48:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:48:55,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582925546] [2023-04-01 04:48:55,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582925546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:48:55,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:48:55,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:48:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855270138] [2023-04-01 04:48:55,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:48:55,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:48:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:55,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:48:55,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:48:55,535 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:55,601 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-01 04:48:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:48:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 04:48:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:55,602 INFO L225 Difference]: With dead ends: 33 [2023-04-01 04:48:55,602 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 04:48:55,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:48:55,604 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:55,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:48:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 04:48:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 04:48:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 04:48:55,613 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 22 [2023-04-01 04:48:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:55,613 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 04:48:55,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 04:48:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:48:55,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:55,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:55,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:48:55,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:55,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 139310648, now seen corresponding path program 1 times [2023-04-01 04:48:55,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:55,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462488626] [2023-04-01 04:48:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:56,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:56,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462488626] [2023-04-01 04:48:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462488626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:48:56,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632955396] [2023-04-01 04:48:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:56,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:48:56,463 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) [2023-04-01 04:48:56,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:48:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:56,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 04:48:56,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:48:56,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:48:56,801 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 04:48:56,815 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:48:56,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 04:48:56,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:48:56,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 04:48:56,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:48:56,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 04:48:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:48:57,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,071 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:48:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:57,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:48:57,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 122 [2023-04-01 04:48:57,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 116 [2023-04-01 04:48:57,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 66 [2023-04-01 04:48:57,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 73 [2023-04-01 04:48:57,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2023-04-01 04:48:57,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 04:48:57,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2023-04-01 04:48:57,698 INFO L321 Elim1Store]: treesize reduction 28, result has 58.2 percent of original size [2023-04-01 04:48:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 152 treesize of output 168 [2023-04-01 04:48:57,723 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 65 [2023-04-01 04:48:57,731 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 61 [2023-04-01 04:48:57,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:48:57,743 INFO L350 Elim1Store]: Elim1 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 101 treesize of output 100 [2023-04-01 04:48:57,755 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 66 [2023-04-01 04:48:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:48:57,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632955396] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:48:57,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814952343] [2023-04-01 04:48:57,991 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:48:57,991 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:48:57,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:48:57,998 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:48:57,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:48:58,060 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:48:58,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:48:58,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:48:59,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '572#(and (<= (+ main_~a~0.base 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (= main_~a~0.offset 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (or (not (= main_~p~0.base 0)) (not (= main_~p~0.offset 0))) (= main_~p~0.offset main_~l1~0.offset) (= main_~p~0.base main_~l1~0.base) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:48:59,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:48:59,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:48:59,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-04-01 04:48:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382376399] [2023-04-01 04:48:59,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:48:59,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 04:48:59,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:48:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 04:48:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1050, Unknown=13, NotChecked=0, Total=1190 [2023-04-01 04:48:59,257 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:48:59,585 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-04-01 04:48:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 04:48:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 04:48:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:48:59,586 INFO L225 Difference]: With dead ends: 52 [2023-04-01 04:48:59,586 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 04:48:59,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=1376, Unknown=13, NotChecked=0, Total=1560 [2023-04-01 04:48:59,588 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:48:59,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 106 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:48:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 04:48:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2023-04-01 04:48:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 04:48:59,595 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 23 [2023-04-01 04:48:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:48:59,595 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 04:48:59,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:48:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 04:48:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:48:59,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:48:59,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:48:59,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:48:59,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:59,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:48:59,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:48:59,804 INFO L85 PathProgramCache]: Analyzing trace with hash 25404986, now seen corresponding path program 1 times [2023-04-01 04:48:59,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:48:59,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4379075] [2023-04-01 04:48:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:59,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:48:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:48:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:48:59,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:48:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4379075] [2023-04-01 04:48:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4379075] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:48:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640709014] [2023-04-01 04:48:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:48:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:48:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:48:59,921 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) [2023-04-01 04:48:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:49:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:00,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 04:49:00,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:00,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:00,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640709014] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907031478] [2023-04-01 04:49:00,171 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 04:49:00,171 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:00,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:00,171 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:00,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:00,194 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:00,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:00,608 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:01,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '870#(and (= main_~l2~0.base main_~p~0.base) (<= (+ main_~a~0.base 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (= main_~a~0.offset 0) (= main_~l1~0.base 0) (= main_~l1~0.offset 0) (or (not (= main_~p~0.base 0)) (not (= main_~p~0.offset 0))) (= main_~p~0.offset main_~l2~0.offset) (= |#NULL.offset| 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:01,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:01,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:01,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-04-01 04:49:01,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297183515] [2023-04-01 04:49:01,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:01,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:49:01,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:49:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:49:01,118 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:01,256 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-04-01 04:49:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:49:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 04:49:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:01,257 INFO L225 Difference]: With dead ends: 59 [2023-04-01 04:49:01,257 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 04:49:01,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:49:01,259 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:01,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 66 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:49:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 04:49:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2023-04-01 04:49:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-04-01 04:49:01,266 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 24 [2023-04-01 04:49:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-04-01 04:49:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-04-01 04:49:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:49:01,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:01,267 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:01,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 04:49:01,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:01,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -97359352, now seen corresponding path program 2 times [2023-04-01 04:49:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620780250] [2023-04-01 04:49:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:02,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620780250] [2023-04-01 04:49:02,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620780250] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653452470] [2023-04-01 04:49:02,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:49:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:02,045 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) [2023-04-01 04:49:02,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:49:02,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:49:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:02,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-01 04:49:02,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:02,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:02,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:02,348 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 04:49:02,358 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:49:02,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 04:49:02,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:49:02,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 04:49:02,465 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:49:02,465 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-04-01 04:49:02,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-01 04:49:02,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:02,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-04-01 04:49:02,596 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 8 [2023-04-01 04:49:02,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 04:49:02,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:49:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:02,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:02,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:02,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 122 [2023-04-01 04:49:03,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 66 [2023-04-01 04:49:03,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 73 [2023-04-01 04:49:03,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 04:49:03,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2023-04-01 04:49:03,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 66 [2023-04-01 04:49:03,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,314 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 121 [2023-04-01 04:49:03,326 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 50 [2023-04-01 04:49:03,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2023-04-01 04:49:03,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2023-04-01 04:49:03,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-04-01 04:49:03,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:03,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2023-04-01 04:49:05,075 INFO L321 Elim1Store]: treesize reduction 164, result has 67.7 percent of original size [2023-04-01 04:49:05,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 9 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 2729 treesize of output 3079 [2023-04-01 04:49:06,295 INFO L321 Elim1Store]: treesize reduction 154, result has 11.5 percent of original size [2023-04-01 04:49:06,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 1691 treesize of output 1763 [2023-04-01 04:49:06,586 INFO L350 Elim1Store]: Elim1 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 1258 treesize of output 1242 [2023-04-01 04:49:06,690 INFO L350 Elim1Store]: Elim1 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 1242 treesize of output 1234 [2023-04-01 04:49:07,561 INFO L321 Elim1Store]: treesize reduction 144, result has 13.8 percent of original size [2023-04-01 04:49:07,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 2143 treesize of output 2076 [2023-04-01 04:49:07,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:07,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1451 treesize of output 1451 [2023-04-01 04:49:08,026 INFO L350 Elim1Store]: Elim1 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 1407 treesize of output 1403 [2023-04-01 04:49:08,102 INFO L350 Elim1Store]: Elim1 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 1403 treesize of output 1399 [2023-04-01 04:49:08,174 INFO L350 Elim1Store]: Elim1 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 1399 treesize of output 1395 [2023-04-01 04:49:08,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:08,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1435 treesize of output 1437 [2023-04-01 04:49:08,450 INFO L350 Elim1Store]: Elim1 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 1393 treesize of output 1377 [2023-04-01 04:49:08,523 INFO L350 Elim1Store]: Elim1 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 1377 treesize of output 1369 [2023-04-01 04:49:08,639 INFO L350 Elim1Store]: Elim1 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 1369 treesize of output 1365 [2023-04-01 04:49:08,724 INFO L350 Elim1Store]: Elim1 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 1365 treesize of output 1361 [2023-04-01 04:49:08,794 INFO L350 Elim1Store]: Elim1 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 1361 treesize of output 1357 [2023-04-01 04:49:08,859 INFO L350 Elim1Store]: Elim1 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 1357 treesize of output 1353 [2023-04-01 04:49:08,933 INFO L350 Elim1Store]: Elim1 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 1353 treesize of output 1351 [2023-04-01 04:49:09,015 INFO L350 Elim1Store]: Elim1 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 1351 treesize of output 1343 [2023-04-01 04:49:09,090 INFO L350 Elim1Store]: Elim1 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 1343 treesize of output 1339 [2023-04-01 04:49:09,164 INFO L350 Elim1Store]: Elim1 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 1339 treesize of output 1337 [2023-04-01 04:49:09,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:09,261 INFO L350 Elim1Store]: Elim1 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 1415 treesize of output 1415 [2023-04-01 04:49:09,435 INFO L350 Elim1Store]: Elim1 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 1330 treesize of output 1328 [2023-04-01 04:49:09,501 INFO L350 Elim1Store]: Elim1 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 1328 treesize of output 1326 [2023-04-01 04:49:09,562 INFO L350 Elim1Store]: Elim1 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 1326 treesize of output 1318 [2023-04-01 04:49:09,638 INFO L350 Elim1Store]: Elim1 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 1318 treesize of output 1306 [2023-04-01 04:49:09,715 INFO L350 Elim1Store]: Elim1 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 1306 treesize of output 1302 [2023-04-01 04:49:09,782 INFO L350 Elim1Store]: Elim1 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 1302 treesize of output 1298 [2023-04-01 04:49:09,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:09,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1338 treesize of output 1338 [2023-04-01 04:49:10,007 INFO L350 Elim1Store]: Elim1 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 1294 treesize of output 1282 [2023-04-01 04:49:10,080 INFO L350 Elim1Store]: Elim1 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 1282 treesize of output 1278 [2023-04-01 04:49:10,159 INFO L350 Elim1Store]: Elim1 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 1278 treesize of output 1274 [2023-04-01 04:49:10,236 INFO L350 Elim1Store]: Elim1 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 1274 treesize of output 1272 [2023-04-01 04:49:10,303 INFO L350 Elim1Store]: Elim1 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 1272 treesize of output 1268 [2023-04-01 04:49:10,359 INFO L350 Elim1Store]: Elim1 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 1268 treesize of output 1266 [2023-04-01 04:49:10,431 INFO L350 Elim1Store]: Elim1 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 1266 treesize of output 1262 [2023-04-01 04:49:10,507 INFO L350 Elim1Store]: Elim1 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 1262 treesize of output 1260 [2023-04-01 04:49:10,583 INFO L350 Elim1Store]: Elim1 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 1260 treesize of output 1256 [2023-04-01 04:49:10,644 INFO L350 Elim1Store]: Elim1 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 1256 treesize of output 1252 [2023-04-01 04:49:10,694 INFO L350 Elim1Store]: Elim1 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 1252 treesize of output 1250 [2023-04-01 04:49:10,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:10,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2023-04-01 04:49:10,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:10,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2023-04-01 04:49:11,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:11,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2023-04-01 04:49:12,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:49:12,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:49:12,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 04:49:12,075 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:49:12,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-04-01 04:49:12,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:12,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-04-01 04:49:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:12,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653452470] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:12,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588526678] [2023-04-01 04:49:12,229 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:49:12,230 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:12,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:12,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:12,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:12,248 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:12,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:12,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:13,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1216#(and (<= (+ main_~a~0.base 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (= main_~a~0.offset 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (or (not (= main_~p~0.base 0)) (not (= main_~p~0.offset 0))) (= main_~p~0.offset main_~l1~0.offset) (= main_~p~0.base main_~l1~0.base) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:13,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:13,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:13,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2023-04-01 04:49:13,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652484423] [2023-04-01 04:49:13,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:13,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 04:49:13,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 04:49:13,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1580, Unknown=7, NotChecked=0, Total=1722 [2023-04-01 04:49:13,305 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:14,715 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-04-01 04:49:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 04:49:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 04:49:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:14,717 INFO L225 Difference]: With dead ends: 76 [2023-04-01 04:49:14,717 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 04:49:14,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=307, Invalid=2989, Unknown=10, NotChecked=0, Total=3306 [2023-04-01 04:49:14,719 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 34 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:14,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 250 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 515 Invalid, 4 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 04:49:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 04:49:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2023-04-01 04:49:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-04-01 04:49:14,726 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 25 [2023-04-01 04:49:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:14,727 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-04-01 04:49:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-04-01 04:49:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:49:14,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:14,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:14,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:14,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:14,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:14,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 733582227, now seen corresponding path program 1 times [2023-04-01 04:49:14,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:14,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5539097] [2023-04-01 04:49:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:14,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:15,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5539097] [2023-04-01 04:49:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5539097] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795241719] [2023-04-01 04:49:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:15,389 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) [2023-04-01 04:49:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:49:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:15,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 04:49:15,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:15,589 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 04:49:15,594 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 04:49:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:15,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:15,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 120 [2023-04-01 04:49:15,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 107 [2023-04-01 04:49:15,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 81 [2023-04-01 04:49:15,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2023-04-01 04:49:15,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 10 [2023-04-01 04:49:15,836 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 04:49:15,836 INFO L350 Elim1Store]: Elim1 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 58 treesize of output 58 [2023-04-01 04:49:15,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 04:49:15,878 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 04:49:15,878 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 86 [2023-04-01 04:49:15,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:15,910 INFO L350 Elim1Store]: Elim1 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 87 treesize of output 74 [2023-04-01 04:49:15,950 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 16 [2023-04-01 04:49:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:49:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795241719] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235847446] [2023-04-01 04:49:15,977 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:49:15,977 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:15,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:15,978 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:15,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:15,991 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:16,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:16,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:16,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1590#(and (<= (+ main_~a~0.base 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (= main_~a~0.offset 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (or (not (= main_~p~0.base 0)) (not (= main_~p~0.offset 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:16,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:16,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 14 [2023-04-01 04:49:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291109805] [2023-04-01 04:49:16,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:49:16,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:49:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-04-01 04:49:16,693 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:16,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:16,839 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2023-04-01 04:49:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:49:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 04:49:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:16,840 INFO L225 Difference]: With dead ends: 57 [2023-04-01 04:49:16,841 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 04:49:16,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-04-01 04:49:16,842 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:16,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 93 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:49:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 04:49:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-04-01 04:49:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-04-01 04:49:16,849 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 25 [2023-04-01 04:49:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:16,849 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-04-01 04:49:16,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-04-01 04:49:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:49:16,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:16,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:16,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:17,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:17,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:17,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1267954751, now seen corresponding path program 1 times [2023-04-01 04:49:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051049705] [2023-04-01 04:49:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:17,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:49:17,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:17,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051049705] [2023-04-01 04:49:17,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051049705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123709114] [2023-04-01 04:49:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:17,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:17,161 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) [2023-04-01 04:49:17,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:49:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:17,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:49:17,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:49:17,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:17,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:17,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 93 [2023-04-01 04:49:17,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:17,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 102 [2023-04-01 04:49:17,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:17,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 96 [2023-04-01 04:49:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:49:17,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123709114] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:49:17,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996563558] [2023-04-01 04:49:17,460 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:49:17,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:49:17,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:49:17,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:49:17,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:49:17,474 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:49:17,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:49:17,757 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:49:18,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1917#(and (= main_~l2~0.base main_~p~0.base) (<= (+ main_~a~0.base 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (= main_~a~0.offset 0) (or (not (= main_~p~0.base 0)) (not (= main_~p~0.offset 0))) (= main_~p~0.offset main_~l2~0.offset) (= |#NULL.offset| 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)) (= |#NULL.base| 0))' at error location [2023-04-01 04:49:18,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:49:18,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:49:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-04-01 04:49:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319329863] [2023-04-01 04:49:18,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:49:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:49:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:49:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:49:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-04-01 04:49:18,106 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:49:18,162 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-04-01 04:49:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:49:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 04:49:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:49:18,163 INFO L225 Difference]: With dead ends: 52 [2023-04-01 04:49:18,163 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 04:49:18,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:49:18,164 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:49:18,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:49:18,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 04:49:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-01 04:49:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-04-01 04:49:18,169 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-04-01 04:49:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:49:18,169 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-04-01 04:49:18,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:49:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-04-01 04:49:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:49:18,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:49:18,170 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:49:18,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 04:49:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:18,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:49:18,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:49:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash 161926409, now seen corresponding path program 3 times [2023-04-01 04:49:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:49:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319223247] [2023-04-01 04:49:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:49:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:49:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:49:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:19,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:49:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319223247] [2023-04-01 04:49:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319223247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:49:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490672972] [2023-04-01 04:49:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:49:19,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:49:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:49:19,913 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) [2023-04-01 04:49:19,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:49:20,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:49:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:49:20,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 100 conjunts are in the unsatisfiable core [2023-04-01 04:49:20,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:49:20,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:20,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:20,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:49:20,134 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:49:20,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:49:20,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:49:20,199 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-04-01 04:49:20,271 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:49:20,271 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2023-04-01 04:49:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 04:49:20,288 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:49:20,288 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2023-04-01 04:49:20,302 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-01 04:49:20,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-01 04:49:20,378 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-04-01 04:49:20,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2023-04-01 04:49:20,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2023-04-01 04:49:20,476 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-01 04:49:20,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 120 [2023-04-01 04:49:20,494 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-04-01 04:49:20,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 115 [2023-04-01 04:49:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2023-04-01 04:49:20,686 INFO L321 Elim1Store]: treesize reduction 60, result has 38.8 percent of original size [2023-04-01 04:49:20,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 54 [2023-04-01 04:49:20,710 INFO L321 Elim1Store]: treesize reduction 66, result has 27.5 percent of original size [2023-04-01 04:49:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 72 [2023-04-01 04:49:20,728 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 04:49:20,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 72 [2023-04-01 04:49:20,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2023-04-01 04:49:20,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-01 04:49:20,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-04-01 04:49:20,911 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 19 [2023-04-01 04:49:20,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 04:49:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:49:21,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:49:21,251 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.offset| c_main_~p~0.base)) (.cse2 (select |c_#memory_$Pointer$.base| c_main_~p~0.base)) (.cse7 (+ c_main_~p~0.offset 4))) (let ((.cse1 (select .cse2 .cse7)) (.cse4 (+ 4 (select .cse5 .cse7))) (.cse0 (= 0 c_main_~flag~0))) (and (or .cse0 (forall ((v_ArrVal_655 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_650 (Array Int Int))) (= 3 (let ((.cse3 (+ v_main_~l1~0.offset_55 4))) (select (select (store (store |c_#memory_int| c_main_~p~0.base v_ArrVal_650) .cse1 v_ArrVal_655) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base (store .cse2 .cse3 c_main_~l1~0.base)) .cse1) .cse4)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base (store .cse5 .cse3 c_main_~l1~0.offset)) .cse1) .cse4)))))) (or (forall ((v_ArrVal_655 (Array Int Int)) (v_main_~l2~0.offset_57 Int) (v_ArrVal_650 (Array Int Int))) (= 3 (let ((.cse6 (+ 4 v_main_~l2~0.offset_57))) (select (select (store (store |c_#memory_int| c_main_~p~0.base v_ArrVal_650) .cse1 v_ArrVal_655) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base (store .cse2 .cse6 c_main_~l2~0.base)) .cse1) .cse4)) (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base (store .cse5 .cse6 c_main_~l2~0.offset)) .cse1) .cse4))))) (not .cse0))))) is different from false [2023-04-01 04:49:21,377 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2023-04-01 04:49:21,377 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 139 [2023-04-01 04:49:21,415 INFO L321 Elim1Store]: treesize reduction 11, result has 94.3 percent of original size [2023-04-01 04:49:21,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1143 treesize of output 1149 [2023-04-01 04:49:21,431 INFO L350 Elim1Store]: Elim1 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 192 treesize of output 150 [2023-04-01 04:49:21,440 INFO L350 Elim1Store]: Elim1 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 233 treesize of output 149 [2023-04-01 04:49:21,581 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse7 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_644 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_641 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_644)) (.cse0 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_641))) (let ((.cse1 (select .cse0 c_main_~a~0.base)) (.cse6 (select .cse5 c_main_~a~0.base))) (let ((.cse2 (+ v_main_~l1~0.offset_55 4)) (.cse3 (select .cse6 .cse7)) (.cse4 (+ (select .cse1 .cse7) 4))) (or (= c_main_~a~0.offset (select (select (store .cse0 c_main_~a~0.base (store .cse1 .cse2 0)) .cse3) .cse4)) (not (= (select (select (store .cse5 c_main_~a~0.base (store .cse6 .cse2 0)) .cse3) .cse4) c_main_~a~0.base))))))) (forall ((v_ArrVal_644 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_641 (Array Int Int))) (= (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_641))) (let ((.cse9 (select .cse8 c_main_~a~0.base))) (select (select (store .cse8 c_main_~a~0.base (store .cse9 (+ v_main_~l1~0.offset_55 4) 0)) (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_644) c_main_~a~0.base) .cse7)) (+ (select .cse9 .cse7) 4)))) c_main_~p~0.offset)) (forall ((v_ArrVal_644 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_641 (Array Int Int))) (= c_main_~p~0.base (select (let ((.cse10 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_644))) (let ((.cse11 (select .cse10 c_main_~a~0.base))) (select (store .cse10 c_main_~a~0.base (store .cse11 (+ v_main_~l1~0.offset_55 4) 0)) (select .cse11 .cse7)))) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_641) c_main_~a~0.base) .cse7) 4)))) (forall ((v_ArrVal_644 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_641 (Array Int Int))) (let ((.cse14 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_644))) (let ((.cse15 (select .cse14 c_main_~a~0.base))) (let ((.cse13 (select .cse15 .cse7))) (let ((.cse12 (select (select (store .cse14 c_main_~a~0.base (store .cse15 (+ v_main_~l1~0.offset_55 4) 0)) .cse13) (+ (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_641) c_main_~a~0.base) .cse7) 4)))) (or (= .cse12 c_main_~a~0.base) (not (= .cse13 .cse12)))))))) (forall ((v_ArrVal_644 (Array Int Int)) (v_main_~l1~0.offset_55 Int) (v_ArrVal_641 (Array Int Int))) (let ((.cse21 (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_644)) (.cse16 (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_641))) (let ((.cse17 (select .cse16 c_main_~a~0.base)) (.cse22 (select .cse21 c_main_~a~0.base))) (let ((.cse18 (+ v_main_~l1~0.offset_55 4)) (.cse19 (select .cse22 .cse7)) (.cse20 (+ (select .cse17 .cse7) 4))) (or (= c_main_~a~0.offset (select (select (store .cse16 c_main_~a~0.base (store .cse17 .cse18 0)) .cse19) .cse20)) (not (= .cse19 (select (select (store .cse21 c_main_~a~0.base (store .cse22 .cse18 0)) .cse19) .cse20)))))))))) (and (= c_main_~p~0.base c_main_~a~0.base) (= c_main_~a~0.offset c_main_~p~0.offset))) is different from false [2023-04-01 04:49:26,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 76 [2023-04-01 04:49:26,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 142 [2023-04-01 04:49:26,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 132 [2023-04-01 04:49:26,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 142 [2023-04-01 04:49:26,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 132 [2023-04-01 04:49:26,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 69 [2023-04-01 04:49:26,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:26,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2023-04-01 04:49:27,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 69 [2023-04-01 04:49:27,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2023-04-01 04:49:27,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 140 [2023-04-01 04:49:27,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 120 [2023-04-01 04:49:27,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 140 [2023-04-01 04:49:27,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 120 [2023-04-01 04:49:27,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 69 [2023-04-01 04:49:27,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2023-04-01 04:49:27,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 69 [2023-04-01 04:49:27,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:49:27,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2023-04-01 04:49:36,366 WARN L223 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 278 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)