/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 EqDomain -i ../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:55:58,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:55:58,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:55:58,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:55:58,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:55:58,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:55:58,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:55:58,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:55:58,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:55:58,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:55:58,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:55:58,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:55:58,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:55:58,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:55:58,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:55:58,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:55:58,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:55:58,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:55:58,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:55:58,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:55:58,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:55:58,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:55:58,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:55:58,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:55:58,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:55:58,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:55:58,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:55:58,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:55:58,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:55:58,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:55:58,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:55:58,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:55:58,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:55:58,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:55:58,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:55:58,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:55:58,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:55:58,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:55:58,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:55:58,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:55:58,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:55:58,388 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 10:55:58,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:55:58,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:55:58,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:55:58,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:55:58,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:55:58,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:55:58,416 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:55:58,416 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:55:58,416 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:55:58,416 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:55:58,417 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:55:58,417 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:55:58,417 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:55:58,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:55:58,418 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:55:58,418 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:55:58,418 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:55:58,418 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:55:58,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:55:58,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:55:58,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:55:58,420 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:55:58,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:55:58,420 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:55:58,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:55:58,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:55:58,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:55:58,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:55:58,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:55:58,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:55:58,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:55:58,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:55:58,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:55:58,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:55:58,666 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:55:58,667 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:55:58,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2023-04-01 10:55:59,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:56:00,041 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:56:00,042 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-2.i [2023-04-01 10:56:00,058 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065a6aea2/a6fdb44ee44649d5816cca0b223e162b/FLAGf0383df00 [2023-04-01 10:56:00,071 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/065a6aea2/a6fdb44ee44649d5816cca0b223e162b [2023-04-01 10:56:00,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:56:00,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:56:00,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:00,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:56:00,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:56:00,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fcc622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00, skipping insertion in model container [2023-04-01 10:56:00,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:56:00,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:56:00,410 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-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2023-04-01 10:56:00,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:00,428 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:56:00,483 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-ext2-properties/list_and_tree_cnstr-2.i[24291,24304] [2023-04-01 10:56:00,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:00,512 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:56:00,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00 WrapperNode [2023-04-01 10:56:00,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:00,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:56:00,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:56:00,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:56:00,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,582 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:56:00,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:56:00,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:56:00,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:56:00,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (1/1) ... [2023-04-01 10:56:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:56:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:00,621 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 10:56:00,623 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 10:56:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:56:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:56:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:56:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:56:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:56:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 10:56:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:56:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:56:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:56:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:56:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:56:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:56:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:56:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:56:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:56:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:56:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:56:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:56:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:56:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:56:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:56:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:56:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 10:56:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:56:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:56:00,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:56:00,843 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:56:00,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:56:00,899 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 10:56:01,214 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:56:01,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:56:01,387 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-01 10:56:01,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:01 BoogieIcfgContainer [2023-04-01 10:56:01,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:56:01,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:56:01,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:56:01,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:56:01,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:56:00" (1/3) ... [2023-04-01 10:56:01,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a10c33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:01, skipping insertion in model container [2023-04-01 10:56:01,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:00" (2/3) ... [2023-04-01 10:56:01,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a10c33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:01, skipping insertion in model container [2023-04-01 10:56:01,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:01" (3/3) ... [2023-04-01 10:56:01,399 INFO L112 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2023-04-01 10:56:01,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:56:01,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:56:01,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:56:01,476 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;@4a8f19f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:56:01,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:56:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:56:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 10:56:01,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:01,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:01,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:01,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1546310716, now seen corresponding path program 1 times [2023-04-01 10:56:01,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:01,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506580388] [2023-04-01 10:56:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:01,722 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 10:56:01,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506580388] [2023-04-01 10:56:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506580388] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:01,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 10:56:01,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952662147] [2023-04-01 10:56:01,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:01,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 10:56:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 10:56:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:56:01,774 INFO L87 Difference]: Start difference. First operand has 43 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 10:56:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:01,869 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2023-04-01 10:56:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 10:56:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 18 [2023-04-01 10:56:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:01,878 INFO L225 Difference]: With dead ends: 81 [2023-04-01 10:56:01,878 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 10:56:01,882 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 10:56:01,918 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:56:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 10:56:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 10:56:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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 10:56:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-04-01 10:56:01,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 18 [2023-04-01 10:56:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:01,964 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-04-01 10:56:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 10:56:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-04-01 10:56:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:56:01,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:01,967 INFO L195 NwaCegarLoop]: trace histogram [1, 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 10:56:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:56:01,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:01,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1523122818, now seen corresponding path program 1 times [2023-04-01 10:56:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:01,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644175937] [2023-04-01 10:56:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:01,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:02,106 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 10:56:02,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644175937] [2023-04-01 10:56:02,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644175937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:02,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:02,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:56:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593919522] [2023-04-01 10:56:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:56:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:56:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:56:02,112 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 10:56:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:02,200 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-04-01 10:56:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:56:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 10:56:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:02,203 INFO L225 Difference]: With dead ends: 57 [2023-04-01 10:56:02,203 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 10:56:02,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:56:02,205 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:02,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:56:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 10:56:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-04-01 10:56:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 10:56:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-01 10:56:02,214 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2023-04-01 10:56:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-01 10:56:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 10:56:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-01 10:56:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:56:02,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:02,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 10:56:02,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:56:02,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:02,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1855382342, now seen corresponding path program 1 times [2023-04-01 10:56:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234553762] [2023-04-01 10:56:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:02,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234553762] [2023-04-01 10:56:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234553762] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:02,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:56:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445070127] [2023-04-01 10:56:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:56:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:56:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:56:02,512 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 10:56:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:02,922 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-04-01 10:56:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:56:02,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 27 [2023-04-01 10:56:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:02,925 INFO L225 Difference]: With dead ends: 60 [2023-04-01 10:56:02,925 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 10:56:02,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:56:02,927 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:02,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 10:56:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 10:56:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-04-01 10:56:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.275) internal successors, (51), 40 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 10:56:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-04-01 10:56:02,937 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 27 [2023-04-01 10:56:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:02,938 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-04-01 10:56:02,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 10:56:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-04-01 10:56:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:56:02,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:02,939 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:56:02,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:02,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 462380597, now seen corresponding path program 1 times [2023-04-01 10:56:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:02,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358118264] [2023-04-01 10:56:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:02,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:03,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358118264] [2023-04-01 10:56:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358118264] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:03,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:56:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19723323] [2023-04-01 10:56:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:03,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:56:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:56:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:56:03,137 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 10:56:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:03,587 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-04-01 10:56:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:56:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 29 [2023-04-01 10:56:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:03,588 INFO L225 Difference]: With dead ends: 64 [2023-04-01 10:56:03,589 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 10:56:03,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:56:03,590 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:03,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 97 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 10:56:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 10:56:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-04-01 10:56:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 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 10:56:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-04-01 10:56:03,596 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2023-04-01 10:56:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:03,597 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-04-01 10:56:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 10:56:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-04-01 10:56:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:56:03,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:03,598 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:03,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:56:03,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:03,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:03,599 INFO L85 PathProgramCache]: Analyzing trace with hash -562322379, now seen corresponding path program 1 times [2023-04-01 10:56:03,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:03,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923001286] [2023-04-01 10:56:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:03,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:03,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923001286] [2023-04-01 10:56:03,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923001286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:03,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:56:03,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397328250] [2023-04-01 10:56:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:03,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:56:03,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:56:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:56:03,765 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 10:56:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:04,109 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-01 10:56:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:56:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 29 [2023-04-01 10:56:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:04,110 INFO L225 Difference]: With dead ends: 62 [2023-04-01 10:56:04,110 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 10:56:04,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:56:04,112 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:04,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 86 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 10:56:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 10:56:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-04-01 10:56:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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 10:56:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-04-01 10:56:04,120 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2023-04-01 10:56:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:04,121 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-04-01 10:56:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 10:56:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-04-01 10:56:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:56:04,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:04,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:04,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:56:04,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:04,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1415455969, now seen corresponding path program 1 times [2023-04-01 10:56:04,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:04,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736031094] [2023-04-01 10:56:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:04,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:04,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:04,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736031094] [2023-04-01 10:56:04,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736031094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:04,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109316568] [2023-04-01 10:56:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:04,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:04,515 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 10:56:04,524 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 10:56:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:04,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 10:56:04,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:04,740 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 10:56:04,861 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 10:56:04,890 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:04,890 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 10:56:04,963 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 10:56:05,028 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 10:56:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:05,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:05,083 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| c_main_~p~0.base v_ArrVal_241) c_main_~a~0.base) c_main_~a~0.offset))) is different from false [2023-04-01 10:56:05,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:05,155 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 2 case distinctions, treesize of input 23 treesize of output 29 [2023-04-01 10:56:05,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:05,177 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 30 treesize of output 33 [2023-04-01 10:56:05,202 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 9 treesize of output 7 [2023-04-01 10:56:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-04-01 10:56:05,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109316568] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:05,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134938470] [2023-04-01 10:56:05,407 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:05,407 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:05,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:05,414 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:05,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:05,513 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:07,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:07,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:10,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '980#(and (exists ((v_main_~p~0.base_25 Int) (v_main_~p~0.offset_23 Int) (|v_#memory_$Pointer$.base_91| (Array Int (Array Int Int))) (|v_#memory_int_113| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_90| (Array Int (Array Int Int)))) (and (or (and (not (= (select |old(#memory_int)| 1) |old(#length)|)) (not (= |#StackHeapBarrier| main_~n~0.base)) (not (= (select |old(#memory_int)| 1) |old(#valid)|)) (= main_~root~0.offset 0) (= main_~a~0.offset 0) (= (select |old(#valid)| 1) 1) (= main_~n~0.offset 0) (= (select |old(#length)| 1) 2) (= main_~root~0.base 0) (= (select |old(#valid)| 0) 0) (not (= main_~a~0.base |#StackHeapBarrier|)) (not (= main_~a~0.base 0)) (not (= |old(#valid)| |old(#length)|)) (not (= |#StackHeapBarrier| 0)) (not (= main_~n~0.base 1)) (= (select (select |old(#memory_int)| 1) 0) 48) (= v_main_~p~0.base_25 main_~a~0.base) (= v_main_~p~0.offset_23 0) (= |#NULL.offset| 0) (not (= main_~n~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= 2 main_~n~0.base)) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 24) (= (select |old(#valid)| main_~n~0.base) 0) (= |#NULL.base| 0)) (and (not (= (select |old(#memory_int)| 1) |old(#length)|)) (not (= |#StackHeapBarrier| main_~n~0.base)) (not (= (select |old(#memory_int)| 1) |old(#valid)|)) (= main_~root~0.offset 0) (= main_~a~0.offset 0) (= (select |old(#valid)| 1) 1) (= main_~n~0.offset 0) (= (select |old(#length)| 1) 2) (= main_~root~0.base 0) (= (select |old(#valid)| 0) 0) (not (= main_~a~0.base |#StackHeapBarrier|)) (not (= main_~a~0.base 0)) (not (= main_~t~0.base |#StackHeapBarrier|)) (not (= |old(#valid)| |old(#length)|)) (not (= main_~t~0.base 0)) (= main_~t~0.offset 0) (not (= |#StackHeapBarrier| 0)) (not (= main_~n~0.base 1)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (not (= main_~n~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= 2 main_~n~0.base)) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 24) (= (select |old(#valid)| main_~n~0.base) 0) (= |#NULL.base| 0))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_90| v_main_~p~0.base_25 (store (select |v_#memory_$Pointer$.offset_90| v_main_~p~0.base_25) v_main_~p~0.offset_23 (select (select |#memory_$Pointer$.offset| v_main_~p~0.base_25) v_main_~p~0.offset_23)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_91| v_main_~p~0.base_25 (store (select |v_#memory_$Pointer$.base_91| v_main_~p~0.base_25) v_main_~p~0.offset_23 (select (select |#memory_$Pointer$.base| v_main_~p~0.base_25) v_main_~p~0.offset_23)))) (= (store |v_#memory_int_113| v_main_~p~0.base_25 (store (select |v_#memory_int_113| v_main_~p~0.base_25) v_main_~p~0.offset_23 3)) |#memory_int|))) (= main_~a~0.offset main_~p~0.offset) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (= main_~a~0.base main_~p~0.base) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)))' at error location [2023-04-01 10:56:10,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:10,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-04-01 10:56:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950360057] [2023-04-01 10:56:10,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 10:56:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 10:56:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1324, Unknown=2, NotChecked=74, Total=1560 [2023-04-01 10:56:10,143 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 10:56:10,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:10,867 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2023-04-01 10:56:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 10:56:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 31 [2023-04-01 10:56:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:10,871 INFO L225 Difference]: With dead ends: 64 [2023-04-01 10:56:10,871 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 10:56:10,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=215, Invalid=1679, Unknown=2, NotChecked=84, Total=1980 [2023-04-01 10:56:10,873 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:10,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 156 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 2 Unknown, 56 Unchecked, 0.6s Time] [2023-04-01 10:56:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 10:56:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2023-04-01 10:56:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 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 10:56:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-04-01 10:56:10,879 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2023-04-01 10:56:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:10,879 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-04-01 10:56:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 10:56:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-04-01 10:56:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:56:10,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:10,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:10,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:56:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 10:56:11,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:11,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2016109663, now seen corresponding path program 1 times [2023-04-01 10:56:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13095921] [2023-04-01 10:56:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:11,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13095921] [2023-04-01 10:56:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13095921] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:11,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935074239] [2023-04-01 10:56:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:11,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:11,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:11,567 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 10:56:11,569 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 10:56:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:11,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 10:56:11,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:11,722 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 10:56:11,767 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 10:56:11,775 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:11,776 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 10:56:11,816 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 10:56:11,857 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 10:56:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:11,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:11,954 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 169 treesize of output 161 [2023-04-01 10:56:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:12,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935074239] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955584469] [2023-04-01 10:56:12,044 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:12,044 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:12,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:12,044 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:12,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:12,076 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:12,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:12,904 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:15,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1362#(and (exists ((|v_#memory_$Pointer$.offset_104| (Array Int (Array Int Int))) (v_main_~p~0.base_34 Int) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_132| (Array Int (Array Int Int))) (v_main_~p~0.offset_30 Int)) (and (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_106| v_main_~p~0.base_34 (store (select |v_#memory_$Pointer$.base_106| v_main_~p~0.base_34) v_main_~p~0.offset_30 (select (select |#memory_$Pointer$.base| v_main_~p~0.base_34) v_main_~p~0.offset_30)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_104| v_main_~p~0.base_34 (store (select |v_#memory_$Pointer$.offset_104| v_main_~p~0.base_34) v_main_~p~0.offset_30 (select (select |#memory_$Pointer$.offset| v_main_~p~0.base_34) v_main_~p~0.offset_30)))) (= |#memory_int| (store |v_#memory_int_132| v_main_~p~0.base_34 (store (select |v_#memory_int_132| v_main_~p~0.base_34) v_main_~p~0.offset_30 3))))) (not (= |#StackHeapBarrier| main_~n~0.base)) (= main_~root~0.offset 0) (= main_~a~0.offset 0) (= (select |old(#valid)| 1) 1) (= main_~n~0.offset 0) (= (select |old(#length)| 1) 2) (= main_~root~0.base 0) (= (select |old(#valid)| 0) 0) (not (= main_~a~0.base |#StackHeapBarrier|)) (= main_~a~0.base main_~p~0.base) (not (= main_~a~0.base 0)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_int| main_~p~0.base) 0) 2)) (= |#NULL.offset| 0) (not (= (select (select |#memory_int| main_~p~0.base) 0) 3)) (not (= main_~n~0.base 0)) (not (= (select (select |#memory_int| main_~p~0.base) 0) 1)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 24) (= main_~p~0.offset 0) (= (select |old(#valid)| main_~n~0.base) 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:56:15,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:15,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:15,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-04-01 10:56:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203853242] [2023-04-01 10:56:15,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 10:56:15,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 10:56:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1258, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 10:56:15,765 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 10:56:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:16,266 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-04-01 10:56:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:56:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 31 [2023-04-01 10:56:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:16,267 INFO L225 Difference]: With dead ends: 60 [2023-04-01 10:56:16,267 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 10:56:16,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=193, Invalid=1528, Unknown=1, NotChecked=0, Total=1722 [2023-04-01 10:56:16,269 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:16,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 212 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 10:56:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 10:56:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-04-01 10:56:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 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 10:56:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-04-01 10:56:16,275 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2023-04-01 10:56:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:16,275 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-04-01 10:56:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 10:56:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-04-01 10:56:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:56:16,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:16,276 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:16,282 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 10:56:16,481 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,SelfDestructingSolverStorable6 [2023-04-01 10:56:16,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:16,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -178063204, now seen corresponding path program 1 times [2023-04-01 10:56:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519819368] [2023-04-01 10:56:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:16,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519819368] [2023-04-01 10:56:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519819368] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806775872] [2023-04-01 10:56:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:16,745 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 10:56:16,747 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 10:56:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:16,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 10:56:16,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:16,937 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 10:56:16,997 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:16,998 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 10:56:17,030 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 10:56:17,039 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 10:56:17,083 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:56:17,084 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 52 treesize of output 49 [2023-04-01 10:56:17,089 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 34 treesize of output 36 [2023-04-01 10:56:17,093 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 23 treesize of output 15 [2023-04-01 10:56:17,118 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 31 treesize of output 19 [2023-04-01 10:56:17,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 [2023-04-01 10:56:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:17,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:17,201 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 79 treesize of output 57 [2023-04-01 10:56:17,209 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_445 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_445) c_main_~a~0.base) .cse0) c_main_~p~0.offset)) (forall ((v_ArrVal_446 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_446) c_main_~a~0.base) .cse0) c_main_~p~0.base)))) is different from false [2023-04-01 10:56:17,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:17,236 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 22 treesize of output 23 [2023-04-01 10:56:17,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:17,244 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 38 treesize of output 31 [2023-04-01 10:56:17,248 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 11 treesize of output 7 [2023-04-01 10:56:17,266 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-01 10:56:17,266 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-04-01 10:56:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-04-01 10:56:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806775872] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507229069] [2023-04-01 10:56:17,380 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:17,381 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:17,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:17,381 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:17,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:17,415 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:18,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:18,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:20,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1756#(and (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)))' at error location [2023-04-01 10:56:20,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:20,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2023-04-01 10:56:20,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599881998] [2023-04-01 10:56:20,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 10:56:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 10:56:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1499, Unknown=1, NotChecked=78, Total=1722 [2023-04-01 10:56:20,368 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 10:56:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:21,416 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-04-01 10:56:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 10:56:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 33 [2023-04-01 10:56:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:21,417 INFO L225 Difference]: With dead ends: 90 [2023-04-01 10:56:21,417 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 10:56:21,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=294, Invalid=2571, Unknown=1, NotChecked=104, Total=2970 [2023-04-01 10:56:21,419 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 159 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 32 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:21,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 274 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 342 Invalid, 23 Unknown, 74 Unchecked, 0.7s Time] [2023-04-01 10:56:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 10:56:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2023-04-01 10:56:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 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 10:56:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2023-04-01 10:56:21,427 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 33 [2023-04-01 10:56:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:21,427 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2023-04-01 10:56:21,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 10:56:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2023-04-01 10:56:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:56:21,428 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:21,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:21,436 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 10:56:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:21,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:21,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash -463415913, now seen corresponding path program 1 times [2023-04-01 10:56:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887905855] [2023-04-01 10:56:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:56:22,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887905855] [2023-04-01 10:56:22,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887905855] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369846516] [2023-04-01 10:56:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:22,116 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 10:56:22,140 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 10:56:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:22,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 10:56:22,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:22,287 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 10:56:22,327 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:22,327 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 10:56:22,346 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 10:56:22,352 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 10:56:22,388 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:56:22,388 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 52 treesize of output 49 [2023-04-01 10:56:22,393 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 23 treesize of output 15 [2023-04-01 10:56:22,396 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 26 treesize of output 28 [2023-04-01 10:56:22,430 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 31 treesize of output 19 [2023-04-01 10:56:22,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 [2023-04-01 10:56:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:22,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:22,478 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 52 treesize of output 30 [2023-04-01 10:56:22,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:22,528 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 22 treesize of output 23 [2023-04-01 10:56:22,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:22,536 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 36 treesize of output 35 [2023-04-01 10:56:22,547 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 10:56:22,553 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-01 10:56:22,554 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 22 treesize of output 1 [2023-04-01 10:56:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:22,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369846516] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:22,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560827397] [2023-04-01 10:56:22,665 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:22,666 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:22,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:22,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:22,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:22,690 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:23,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:23,633 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:25,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2242#(and (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= (select (select |#memory_int| main_~a~0.base) main_~a~0.offset) 1)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)))' at error location [2023-04-01 10:56:25,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:25,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:25,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-04-01 10:56:25,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196929767] [2023-04-01 10:56:25,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:25,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 10:56:25,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 10:56:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1487, Unknown=4, NotChecked=0, Total=1640 [2023-04-01 10:56:25,844 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 10:56:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:26,707 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2023-04-01 10:56:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 10:56:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 35 [2023-04-01 10:56:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:26,708 INFO L225 Difference]: With dead ends: 84 [2023-04-01 10:56:26,708 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 10:56:26,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=259, Invalid=2287, Unknown=4, NotChecked=0, Total=2550 [2023-04-01 10:56:26,710 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:26,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 222 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 10:56:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 10:56:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2023-04-01 10:56:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 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 10:56:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-04-01 10:56:26,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 35 [2023-04-01 10:56:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:26,717 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-04-01 10:56:26,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 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 10:56:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-04-01 10:56:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:56:26,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:26,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:26,725 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 10:56:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:26,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:26,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2053038167, now seen corresponding path program 1 times [2023-04-01 10:56:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251484638] [2023-04-01 10:56:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:56:27,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251484638] [2023-04-01 10:56:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251484638] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838216504] [2023-04-01 10:56:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:27,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:27,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:27,330 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 10:56:27,333 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 10:56:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:27,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 10:56:27,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:27,495 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 10:56:27,534 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:27,534 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 10:56:27,563 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 13 treesize of output 9 [2023-04-01 10:56:27,570 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 13 treesize of output 9 [2023-04-01 10:56:27,625 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:56:27,625 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 64 treesize of output 61 [2023-04-01 10:56:27,630 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 42 treesize of output 44 [2023-04-01 10:56:27,634 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 29 treesize of output 19 [2023-04-01 10:56:27,659 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 39 treesize of output 21 [2023-04-01 10:56:27,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 11 [2023-04-01 10:56:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:27,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:27,712 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 52 treesize of output 30 [2023-04-01 10:56:27,718 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 4))) (and (forall ((v_ArrVal_650 (Array Int Int))) (= c_main_~p~0.base (select (select (store |c_#memory_$Pointer$.base| c_main_~p~0.base v_ArrVal_650) c_main_~a~0.base) .cse0))) (forall ((v_ArrVal_652 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_main_~p~0.base v_ArrVal_652) c_main_~a~0.base) .cse0) c_main_~p~0.offset)))) is different from false [2023-04-01 10:56:27,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:27,739 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 22 treesize of output 23 [2023-04-01 10:56:27,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:27,746 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 36 treesize of output 35 [2023-04-01 10:56:27,757 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 10:56:27,762 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-01 10:56:27,763 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 22 treesize of output 1 [2023-04-01 10:56:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-04-01 10:56:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838216504] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:27,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984900597] [2023-04-01 10:56:27,838 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:27,838 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:27,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:27,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:27,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:27,860 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:28,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:28,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:31,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2711#(and (not (= |#StackHeapBarrier| main_~n~0.base)) (= main_~root~0.offset 0) (= main_~a~0.offset 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (= (select |old(#valid)| 1) 1) (= main_~n~0.offset 0) (= (select |old(#length)| 1) 2) (= main_~root~0.base 0) (= (select |old(#valid)| 0) 0) (not (= main_~a~0.base |#StackHeapBarrier|)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= main_~a~0.base 0)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)) (not (= main_~n~0.base 0)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select |old(#length)| 2) 24) (= (select |old(#valid)| main_~n~0.base) 0) (= |#NULL.base| 0))' at error location [2023-04-01 10:56:31,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:31,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-04-01 10:56:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722460540] [2023-04-01 10:56:31,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 10:56:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 10:56:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1483, Unknown=1, NotChecked=78, Total=1722 [2023-04-01 10:56:31,033 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 10:56:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:34,268 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-04-01 10:56:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 10:56:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 35 [2023-04-01 10:56:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:34,269 INFO L225 Difference]: With dead ends: 79 [2023-04-01 10:56:34,269 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 10:56:34,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=280, Invalid=2273, Unknown=1, NotChecked=98, Total=2652 [2023-04-01 10:56:34,271 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:34,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 248 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 325 Invalid, 0 Unknown, 61 Unchecked, 0.9s Time] [2023-04-01 10:56:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 10:56:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-04-01 10:56:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 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 10:56:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2023-04-01 10:56:34,281 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 35 [2023-04-01 10:56:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:34,283 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2023-04-01 10:56:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 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 10:56:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2023-04-01 10:56:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 10:56:34,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:34,286 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:34,295 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 10:56:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 10:56:34,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:34,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 763692931, now seen corresponding path program 2 times [2023-04-01 10:56:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249045427] [2023-04-01 10:56:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:34,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249045427] [2023-04-01 10:56:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249045427] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638216771] [2023-04-01 10:56:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:56:34,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:34,952 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 10:56:34,979 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 10:56:35,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 10:56:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:56:35,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 10:56:35,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:35,327 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 10:56:35,370 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 10:56:35,379 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:56:35,380 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 10:56:35,406 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 10:56:35,422 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 10:56:35,454 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 10:56:35,495 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 10:56:35,496 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 19 treesize of output 22 [2023-04-01 10:56:35,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:35,533 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 31 treesize of output 23 [2023-04-01 10:56:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:35,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:35,596 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0.base_83 Int) (v_ArrVal_784 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_main_~p~0.base v_ArrVal_784))) (store .cse0 v_main_~p~0.base_83 (store (select .cse0 v_main_~p~0.base_83) c_main_~t~0.offset 3))) c_main_~a~0.base) c_main_~a~0.offset) 1))) is different from false [2023-04-01 10:56:35,607 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0.base_83 Int) (v_ArrVal_784 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_int| c_main_~p~0.base v_ArrVal_784))) (store .cse0 v_main_~p~0.base_83 (store (select .cse0 v_main_~p~0.base_83) 0 3))) c_main_~a~0.base) c_main_~a~0.offset) 1))) is different from false [2023-04-01 10:56:35,616 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0.base_83 Int) (v_ArrVal_784 (Array Int Int)) (v_ArrVal_778 Int)) (not (= (select (select (let ((.cse0 (store (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) (+ c_main_~p~0.offset 4) v_ArrVal_778)) c_main_~t~0.base v_ArrVal_784))) (store .cse0 v_main_~p~0.base_83 (store (select .cse0 v_main_~p~0.base_83) 0 3))) c_main_~a~0.base) c_main_~a~0.offset) 1))) is different from false [2023-04-01 10:56:35,631 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:35,631 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 2 case distinctions, treesize of input 48 treesize of output 41 [2023-04-01 10:56:35,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:35,650 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 295 treesize of output 301 [2023-04-01 10:56:35,671 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 130 treesize of output 122 [2023-04-01 10:56:35,749 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 10:56:35,780 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 10:56:35,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:35,796 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 26 [2023-04-01 10:56:35,820 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2023-04-01 10:56:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-04-01 10:56:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638216771] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:35,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061856773] [2023-04-01 10:56:35,916 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:35,917 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:35,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:35,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:35,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:35,940 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:36,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:36,822 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:38,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3180#(and (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 1)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)))' at error location [2023-04-01 10:56:38,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:38,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:38,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-04-01 10:56:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074727604] [2023-04-01 10:56:38,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 10:56:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 10:56:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1345, Unknown=3, NotChecked=228, Total=1722 [2023-04-01 10:56:38,858 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 10:56:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:41,871 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2023-04-01 10:56:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 10:56:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 37 [2023-04-01 10:56:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:41,872 INFO L225 Difference]: With dead ends: 94 [2023-04-01 10:56:41,872 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 10:56:41,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=284, Invalid=2275, Unknown=3, NotChecked=300, Total=2862 [2023-04-01 10:56:41,874 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:41,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 242 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 256 Invalid, 0 Unknown, 219 Unchecked, 0.6s Time] [2023-04-01 10:56:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 10:56:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2023-04-01 10:56:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 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 10:56:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2023-04-01 10:56:41,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2023-04-01 10:56:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:41,881 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2023-04-01 10:56:41,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 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 10:56:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2023-04-01 10:56:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 10:56:41,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:41,883 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:41,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 10:56:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:42,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:42,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash -261010045, now seen corresponding path program 2 times [2023-04-01 10:56:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021004003] [2023-04-01 10:56:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:42,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:56:42,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:42,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021004003] [2023-04-01 10:56:42,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021004003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:42,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354752197] [2023-04-01 10:56:42,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:56:42,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:42,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:56:42,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 10:56:43,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 10:56:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:56:43,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-01 10:56:43,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:43,227 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 10:56:43,271 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 10:56:43,271 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 10:56:43,323 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 10:56:43,328 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 10:56:43,391 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 10:56:43,392 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 10:56:43,397 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 10:56:43,404 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 10:56:43,416 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:56:43,416 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 10:56:43,430 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-01 10:56:43,430 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 10:56:43,519 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-04-01 10:56:43,520 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 141 treesize of output 103 [2023-04-01 10:56:43,528 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 41 treesize of output 36 [2023-04-01 10:56:43,533 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 115 treesize of output 93 [2023-04-01 10:56:43,656 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-01 10:56:43,656 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 160 treesize of output 133 [2023-04-01 10:56:43,676 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-04-01 10:56:43,676 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 132 treesize of output 128 [2023-04-01 10:56:43,685 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 55 treesize of output 40 [2023-04-01 10:56:43,793 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-04-01 10:56:43,793 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 50 [2023-04-01 10:56:43,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-04-01 10:56:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:43,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:56:44,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:44,068 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 79 [2023-04-01 10:56:44,088 INFO L321 Elim1Store]: treesize reduction 4, result has 91.7 percent of original size [2023-04-01 10:56:44,089 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 3156 treesize of output 3004 [2023-04-01 10:56:44,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:44,157 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 291 treesize of output 269 [2023-04-01 10:56:44,419 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 8 treesize of output 4 [2023-04-01 10:56:44,633 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 60 treesize of output 44 [2023-04-01 10:56:45,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,765 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 29 treesize of output 30 [2023-04-01 10:56:45,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,774 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 35 treesize of output 36 [2023-04-01 10:56:45,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,784 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 258 treesize of output 197 [2023-04-01 10:56:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:45,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-01 10:56:45,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,824 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 29 treesize of output 25 [2023-04-01 10:56:45,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,832 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 20 treesize of output 20 [2023-04-01 10:56:45,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,886 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 29 treesize of output 30 [2023-04-01 10:56:45,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,895 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 35 treesize of output 36 [2023-04-01 10:56:45,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,907 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 306 treesize of output 197 [2023-04-01 10:56:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:45,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-01 10:56:45,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,936 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 20 treesize of output 20 [2023-04-01 10:56:45,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,947 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 29 treesize of output 25 [2023-04-01 10:56:45,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,988 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 59 treesize of output 49 [2023-04-01 10:56:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:45,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:45,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2023-04-01 10:56:46,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,013 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 32 [2023-04-01 10:56:46,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,029 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 30 treesize of output 31 [2023-04-01 10:56:46,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,040 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 227 treesize of output 172 [2023-04-01 10:56:46,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,050 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 62 treesize of output 52 [2023-04-01 10:56:46,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:46,074 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 68 treesize of output 82 [2023-04-01 10:56:46,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 59 [2023-04-01 10:56:46,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,112 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 31 [2023-04-01 10:56:46,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,399 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 59 treesize of output 49 [2023-04-01 10:56:46,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,411 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 317 treesize of output 298 [2023-04-01 10:56:46,422 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 49 [2023-04-01 10:56:46,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,431 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 117 treesize of output 97 [2023-04-01 10:56:46,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,495 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 30 treesize of output 31 [2023-04-01 10:56:46,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,503 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 46 treesize of output 47 [2023-04-01 10:56:46,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,516 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 265 treesize of output 204 [2023-04-01 10:56:46,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,541 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 75 treesize of output 75 [2023-04-01 10:56:46,551 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 62 treesize of output 54 [2023-04-01 10:56:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:46,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,571 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 47 treesize of output 46 [2023-04-01 10:56:46,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,587 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 95 treesize of output 79 [2023-04-01 10:56:46,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,674 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 29 treesize of output 30 [2023-04-01 10:56:46,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,687 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 165 treesize of output 128 [2023-04-01 10:56:46,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,697 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 29 treesize of output 30 [2023-04-01 10:56:46,704 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 70 treesize of output 62 [2023-04-01 10:56:46,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,716 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 41 treesize of output 41 [2023-04-01 10:56:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:46,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,732 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 36 treesize of output 35 [2023-04-01 10:56:46,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,744 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 79 treesize of output 63 [2023-04-01 10:56:46,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,799 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 30 treesize of output 31 [2023-04-01 10:56:46,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,808 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 70 [2023-04-01 10:56:46,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,820 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 288 treesize of output 221 [2023-04-01 10:56:46,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,833 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 75 treesize of output 75 [2023-04-01 10:56:46,841 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 62 treesize of output 54 [2023-04-01 10:56:46,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,872 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 342 treesize of output 346 [2023-04-01 10:56:46,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 202 treesize of output 176 [2023-04-01 10:56:46,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:46,910 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 79 treesize of output 75 [2023-04-01 10:56:47,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,208 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 51 treesize of output 41 [2023-04-01 10:56:47,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:47,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,219 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 77 treesize of output 58 [2023-04-01 10:56:47,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,227 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 27 [2023-04-01 10:56:47,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,265 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 29 treesize of output 30 [2023-04-01 10:56:47,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,276 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 303 treesize of output 200 [2023-04-01 10:56:47,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,284 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 29 treesize of output 30 [2023-04-01 10:56:47,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,293 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 38 treesize of output 38 [2023-04-01 10:56:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:47,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,307 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 36 treesize of output 35 [2023-04-01 10:56:47,312 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 32 treesize of output 24 [2023-04-01 10:56:47,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,320 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 71 treesize of output 63 [2023-04-01 10:56:47,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,381 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 51 treesize of output 41 [2023-04-01 10:56:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:56:47,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 58 [2023-04-01 10:56:47,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:56:47,407 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 27 [2023-04-01 10:56:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:56:48,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354752197] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:56:48,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807708939] [2023-04-01 10:56:48,411 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 10:56:48,411 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:56:48,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:56:48,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:56:48,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:56:48,434 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:56:49,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:56:49,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:56:51,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3693#(and (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 3)) (not (= (select (select |#memory_int| main_~a~0.base) main_~a~0.offset) 1)) (not (= (select (select |#memory_int| main_~p~0.base) main_~p~0.offset) 2)))' at error location [2023-04-01 10:56:51,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:56:51,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:56:51,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2023-04-01 10:56:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226740839] [2023-04-01 10:56:51,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:56:51,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 10:56:51,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 10:56:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2341, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 10:56:51,834 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 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)