/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/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:01:55,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:01:55,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:01:55,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:01:55,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:01:55,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:01:55,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:01:55,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:01:55,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:01:55,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:01:55,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:01:55,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:01:55,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:01:55,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:01:55,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:01:55,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:01:55,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:01:55,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:01:55,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:01:55,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:01:55,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:01:55,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:01:55,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:01:55,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:01:55,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:01:55,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:01:55,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:01:55,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:01:55,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:01:55,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:01:55,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:01:55,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:01:55,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:01:55,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:01:55,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:01:55,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:01:55,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:01:55,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:01:55,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:01:55,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:01:55,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:01:55,762 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 11:01:55,785 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:01:55,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:01:55,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:01:55,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:01:55,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:01:55,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:01:55,786 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:01:55,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:01:55,786 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:01:55,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:01:55,787 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:01:55,787 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:01:55,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:01:55,788 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:01:55,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:01:55,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:01:55,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:01:55,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:01:55,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:01:55,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:01:55,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:01:55,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:01:55,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:01:56,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:01:56,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:01:56,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:01:56,063 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:01:56,064 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:01:56,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2023-04-01 11:01:57,196 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:01:57,361 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:01:57,362 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2023-04-01 11:01:57,365 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a7bbd9c/c31235bc882d44d6a9ae1922dba8760e/FLAG9ddc10810 [2023-04-01 11:01:57,376 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a7bbd9c/c31235bc882d44d6a9ae1922dba8760e [2023-04-01 11:01:57,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:01:57,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:01:57,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:01:57,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:01:57,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:01:57,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf97371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57, skipping insertion in model container [2023-04-01 11:01:57,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:01:57,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:01:57,508 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/loops/linear_search.c[383,396] [2023-04-01 11:01:57,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:01:57,528 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:01:57,537 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/loops/linear_search.c[383,396] [2023-04-01 11:01:57,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:01:57,555 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:01:57,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57 WrapperNode [2023-04-01 11:01:57,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:01:57,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:01:57,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:01:57,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:01:57,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:01:57,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:01:57,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:01:57,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:01:57,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (1/1) ... [2023-04-01 11:01:57,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:01:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:57,613 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 11:01:57,617 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 11:01:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:01:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:01:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:01:57,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:01:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2023-04-01 11:01:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:01:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-01 11:01:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:01:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:01:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:01:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:01:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:01:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:01:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:01:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:01:57,713 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:01:57,715 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:01:58,000 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:01:58,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:01:58,080 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:01:58,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:01:58 BoogieIcfgContainer [2023-04-01 11:01:58,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:01:58,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:01:58,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:01:58,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:01:58,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:01:57" (1/3) ... [2023-04-01 11:01:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a098323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:01:58, skipping insertion in model container [2023-04-01 11:01:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:01:57" (2/3) ... [2023-04-01 11:01:58,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a098323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:01:58, skipping insertion in model container [2023-04-01 11:01:58,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:01:58" (3/3) ... [2023-04-01 11:01:58,097 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search.c [2023-04-01 11:01:58,110 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:01:58,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:01:58,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:01:58,151 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;@2d0a7cbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:01:58,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:01:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:01:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:01:58,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:58,160 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] [2023-04-01 11:01:58,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:58,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash -757449597, now seen corresponding path program 1 times [2023-04-01 11:01:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:58,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562564056] [2023-04-01 11:01:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:58,364 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 11:01:58,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:58,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562564056] [2023-04-01 11:01:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562564056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:01:58,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:01:58,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:01:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92653470] [2023-04-01 11:01:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:01:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:01:58,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:01:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:01:58,395 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:01:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:58,429 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-04-01 11:01:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:01:58,431 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-04-01 11:01:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:58,437 INFO L225 Difference]: With dead ends: 44 [2023-04-01 11:01:58,437 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:01:58,441 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 11:01:58,447 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:58,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:01:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:01:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 11:01:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-01 11:01:58,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2023-04-01 11:01:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:58,485 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-01 11:01:58,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:01:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-01 11:01:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:01:58,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:58,489 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] [2023-04-01 11:01:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:01:58,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:58,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1188193484, now seen corresponding path program 1 times [2023-04-01 11:01:58,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:58,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325528449] [2023-04-01 11:01:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:58,990 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 11:01:58,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325528449] [2023-04-01 11:01:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325528449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:01:58,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:01:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:01:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126616935] [2023-04-01 11:01:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:01:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:01:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:01:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:01:58,997 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:59,158 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2023-04-01 11:01:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:01:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-04-01 11:01:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:59,160 INFO L225 Difference]: With dead ends: 32 [2023-04-01 11:01:59,161 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 11:01:59,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:01:59,166 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:59,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 72 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:01:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 11:01:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 11:01:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:01:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-04-01 11:01:59,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2023-04-01 11:01:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-04-01 11:01:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:01:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-04-01 11:01:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 11:01:59,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:59,190 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] [2023-04-01 11:01:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:01:59,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:59,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -427023574, now seen corresponding path program 1 times [2023-04-01 11:01:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306657862] [2023-04-01 11:01:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:59,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:01:59,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306657862] [2023-04-01 11:01:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306657862] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:59,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159360393] [2023-04-01 11:01:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:59,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:59,606 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 11:01:59,610 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 11:01:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:59,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:01:59,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:01:59,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:02:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:00,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159360393] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:02:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855982819] [2023-04-01 11:02:00,313 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:02:00,313 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:02:00,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:02:00,321 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:02:00,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:02:00,477 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 11:02:01,627 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2023-04-01 11:02:01,667 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 86 for LOIs [2023-04-01 11:02:01,683 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 104 for LOIs [2023-04-01 11:02:02,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 11:02:02,131 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:02:08,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (= ~MAX~0 100000) (not (= (mod ~SIZE~0 4294967296) 100000)) (exists ((|v_old(#memory_int)_BEFORE_CALL_5| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_5| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_5| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_5| (select |v_old(#memory_int)_BEFORE_CALL_5| 1))) (= (select |v_old(#valid)_BEFORE_CALL_5| v_main_~a~0.base_BEFORE_CALL_3) 0) (= (select |v_old(#valid)_BEFORE_CALL_5| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= (select |v_old(#length)_BEFORE_CALL_5| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_5| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_5| 1) |v_old(#length)_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_5| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select |v_old(#valid)_BEFORE_CALL_5| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_5| |v_old(#length)_BEFORE_CALL_5|)) (= 2 (select |v_old(#length)_BEFORE_CALL_5| 1)) (= 16 (select |v_old(#length)_BEFORE_CALL_5| 2)))) (not (= (mod ~SIZE~0 4294967296) 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:02:08,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:02:08,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:02:08,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-04-01 11:02:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286605532] [2023-04-01 11:02:08,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:02:08,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 11:02:08,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:02:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 11:02:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1279, Unknown=5, NotChecked=0, Total=1406 [2023-04-01 11:02:08,626 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 11:02:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:02:08,923 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2023-04-01 11:02:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:02:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2023-04-01 11:02:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:02:08,924 INFO L225 Difference]: With dead ends: 34 [2023-04-01 11:02:08,925 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 11:02:08,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=158, Invalid=1643, Unknown=5, NotChecked=0, Total=1806 [2023-04-01 11:02:08,926 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:02:08,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 104 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:02:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 11:02:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 11:02:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:02:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-04-01 11:02:08,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2023-04-01 11:02:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:02:08,933 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-04-01 11:02:08,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 11:02:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-04-01 11:02:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 11:02:08,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:08,934 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:08,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:02:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:09,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:09,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2127544840, now seen corresponding path program 2 times [2023-04-01 11:02:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:09,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112270752] [2023-04-01 11:02:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:10,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:02:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112270752] [2023-04-01 11:02:10,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112270752] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:02:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053481623] [2023-04-01 11:02:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:02:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:10,405 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 11:02:10,408 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 11:02:10,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:02:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:02:10,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 11:02:10,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:02:10,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-01 11:02:10,613 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 18 treesize of output 17 [2023-04-01 11:02:10,618 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 11:02:11,217 INFO L321 Elim1Store]: treesize reduction 19, result has 55.8 percent of original size [2023-04-01 11:02:11,218 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 37 treesize of output 34 [2023-04-01 11:02:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:11,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:02:12,505 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 60 treesize of output 56 [2023-04-01 11:02:12,513 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-01 11:02:12,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-01 11:02:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053481623] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:02:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090985762] [2023-04-01 11:02:12,524 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:02:12,525 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:02:12,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:02:12,526 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:02:12,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:02:12,576 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 11:02:13,153 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2023-04-01 11:02:13,182 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 86 for LOIs [2023-04-01 11:02:13,193 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 104 for LOIs [2023-04-01 11:02:13,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 11:02:13,543 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:02:20,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '673#(and (= ~MAX~0 100000) (not (= (mod ~SIZE~0 4294967296) 100000)) (not (= (mod ~SIZE~0 4294967296) 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_12| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_12| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_9 Int) (|v_old(#length)_BEFORE_CALL_12| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_9 0)) (= (select |v_old(#length)_BEFORE_CALL_12| 3) 12) (= 16 (select |v_old(#length)_BEFORE_CALL_12| 2)) (= (select |v_old(#valid)_BEFORE_CALL_12| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_12| v_main_~a~0.base_BEFORE_CALL_9) 0) (not (= |v_old(#valid)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_9 3)) (= (select |v_old(#valid)_BEFORE_CALL_12| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_12| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_9 1)) (not (= v_main_~a~0.base_BEFORE_CALL_9 2)) (not (= |v_old(#valid)_BEFORE_CALL_12| |v_old(#length)_BEFORE_CALL_12|)) (not (= v_main_~a~0.base_BEFORE_CALL_9 |#StackHeapBarrier|)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 1)) (not (= |v_old(#length)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_12| 0) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 11:02:20,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:02:20,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:02:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 31 [2023-04-01 11:02:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119225762] [2023-04-01 11:02:20,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:02:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 11:02:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:02:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 11:02:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2359, Unknown=3, NotChecked=0, Total=2550 [2023-04-01 11:02:20,063 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 31 states, 25 states have (on average 1.72) internal successors, (43), 28 states have internal predecessors, (43), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:02:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:02:21,317 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2023-04-01 11:02:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:02:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.72) internal successors, (43), 28 states have internal predecessors, (43), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 25 [2023-04-01 11:02:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:02:21,318 INFO L225 Difference]: With dead ends: 36 [2023-04-01 11:02:21,318 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:02:21,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=335, Invalid=3694, Unknown=3, NotChecked=0, Total=4032 [2023-04-01 11:02:21,320 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:02:21,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 116 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:02:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:02:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 11:02:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:02:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-04-01 11:02:21,328 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2023-04-01 11:02:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:02:21,328 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-04-01 11:02:21,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.72) internal successors, (43), 28 states have internal predecessors, (43), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:02:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-04-01 11:02:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 11:02:21,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:21,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:21,341 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 11:02:21,529 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,SelfDestructingSolverStorable3 [2023-04-01 11:02:21,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:21,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 346497382, now seen corresponding path program 3 times [2023-04-01 11:02:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515956046] [2023-04-01 11:02:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:22,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:02:22,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515956046] [2023-04-01 11:02:22,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515956046] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:02:22,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362418460] [2023-04-01 11:02:22,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:02:22,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:22,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:22,657 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 11:02:22,659 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 11:02:22,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:02:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:02:22,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 11:02:22,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:02:22,822 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 7 treesize of output 6 [2023-04-01 11:02:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-04-01 11:02:23,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:02:23,957 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 55 treesize of output 53 [2023-04-01 11:02:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:24,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:02:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:34,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362418460] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:02:34,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125723039] [2023-04-01 11:02:34,984 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:02:34,984 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:02:34,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:02:34,985 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:02:34,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:02:35,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 11:02:35,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2023-04-01 11:02:35,545 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 86 for LOIs [2023-04-01 11:02:35,556 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 104 for LOIs [2023-04-01 11:02:35,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 11:02:35,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:02:43,294 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~SIZE~0 4294967296))) (and (exists ((|v_old(#valid)_BEFORE_CALL_20| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_20| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_20| (Array Int (Array Int Int)))) (let ((.cse0 (select |v_old(#memory_int)_BEFORE_CALL_20| 1))) (and (not (= |v_old(#valid)_BEFORE_CALL_20| |v_old(#length)_BEFORE_CALL_20|)) (= (select .cse0 1) 0) (not (= .cse0 |v_old(#length)_BEFORE_CALL_20|)) (= (select |v_old(#valid)_BEFORE_CALL_20| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_20| 3) 1) (= (select .cse0 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_20| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_20| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_20| .cse0)) (= (select |v_old(#length)_BEFORE_CALL_20| 2) 16) (= (select |v_old(#valid)_BEFORE_CALL_20| |c_linear_search_#in~a.base|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_20| 1)) (= (select |v_old(#valid)_BEFORE_CALL_20| 1) 1)))) (= c_~MAX~0 100000) (not (= |c_#StackHeapBarrier| 0)) (not (= .cse1 100000)) (= |c_#NULL.offset| 0) (= |c_linear_search_#in~q| 3) (= |c_#NULL.base| 0) (not (= |c_linear_search_#in~a.base| 0)) (= |c_linear_search_#in~a.offset| 0) (let ((.cse2 (mod (div .cse1 2) 4294967296))) (let ((.cse3 (* .cse2 4))) (or (and (<= .cse2 2147483647) (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= |c_#memory_int| (store |v_#memory_int_48| |c_linear_search_#in~a.base| (store (select |v_#memory_int_48| |c_linear_search_#in~a.base|) .cse3 3))))) (and (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= (store |v_#memory_int_48| |c_linear_search_#in~a.base| (store (select |v_#memory_int_48| |c_linear_search_#in~a.base|) (+ (- 17179869184) .cse3) 3)) |c_#memory_int|)) (< 2147483647 .cse2))))) (not (= .cse1 1)) (or (and (< 2147483647 .cse1) (= .cse1 (+ |c_linear_search_#in~n| 4294967296))) (and (= |c_linear_search_#in~n| .cse1) (<= .cse1 2147483647))) (not (= |c_#StackHeapBarrier| |c_linear_search_#in~a.base|)) (not (= 3 |c_linear_search_#in~a.base|)) (not (= |c_linear_search_#in~a.base| 1)) (not (= 2 |c_linear_search_#in~a.base|)))) is different from true [2023-04-01 11:02:45,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1016#(and (= ~MAX~0 100000) (not (= (mod ~SIZE~0 4294967296) 100000)) (not (= (mod ~SIZE~0 4294967296) 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_15 Int) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_15 2)) (not (= v_main_~a~0.base_BEFORE_CALL_15 3)) (not (= v_main_~a~0.base_BEFORE_CALL_15 1)) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_15 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_15 0)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_15) 0) (= 16 (select |v_old(#length)_BEFORE_CALL_19| 2)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:02:45,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:02:45,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:02:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 16] total 43 [2023-04-01 11:02:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817345417] [2023-04-01 11:02:45,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:02:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 11:02:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:02:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 11:02:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3531, Unknown=2, NotChecked=120, Total=3906 [2023-04-01 11:02:45,288 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:02:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:02:47,961 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2023-04-01 11:02:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 11:02:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 27 [2023-04-01 11:02:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:02:47,963 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:02:47,963 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:02:47,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=318, Invalid=4376, Unknown=2, NotChecked=134, Total=4830 [2023-04-01 11:02:47,965 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:02:47,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 145 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 11:02:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:02:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 11:02:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:02:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2023-04-01 11:02:47,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2023-04-01 11:02:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:02:47,973 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2023-04-01 11:02:47,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 39 states have internal predecessors, (47), 8 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:02:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2023-04-01 11:02:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 11:02:47,974 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:47,974 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:47,983 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 11:02:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:48,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:48,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1843125948, now seen corresponding path program 4 times [2023-04-01 11:02:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314048851] [2023-04-01 11:02:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:51,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:02:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314048851] [2023-04-01 11:02:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314048851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:02:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686716612] [2023-04-01 11:02:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:02:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:51,105 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 11:02:51,111 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 11:02:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:51,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 11:02:51,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:02:51,323 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 7 treesize of output 6 [2023-04-01 11:02:51,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-04-01 11:02:53,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:02:53,199 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 78 treesize of output 72 [2023-04-01 11:02:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:53,296 INFO L327 TraceCheckSpWp]: Computing backward predicates...