/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/array-fpi/pcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:06:44,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:06:44,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:06:44,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:06:44,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:06:44,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:06:44,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:06:44,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:06:44,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:06:44,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:06:44,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:06:44,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:06:44,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:06:44,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:06:44,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:06:44,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:06:44,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:06:44,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:06:44,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:06:44,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:06:44,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:06:44,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:06:44,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:06:44,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:06:44,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:06:44,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:06:44,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:06:44,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:06:44,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:06:44,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:06:44,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:06:44,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:06:44,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:06:44,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:06:44,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:06:44,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:06:44,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:06:44,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:06:44,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:06:44,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:06:44,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:06:44,356 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 09:06:44,381 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:06:44,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:06:44,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:06:44,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:06:44,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:06:44,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:06:44,382 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:06:44,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:06:44,383 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:06:44,384 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:06:44,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:06:44,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:06:44,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:06:44,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:44,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:06:44,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:06:44,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:06:44,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:06:44,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:06:44,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:06:44,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:06:44,600 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:06:44,600 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:06:44,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/pcompf.c [2023-04-01 09:06:45,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:06:45,824 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:06:45,825 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/pcompf.c [2023-04-01 09:06:45,830 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4cf69d7e/3f557e0205564ce89a3f3e38c9f4f1cb/FLAGd7f32d663 [2023-04-01 09:06:45,847 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4cf69d7e/3f557e0205564ce89a3f3e38c9f4f1cb [2023-04-01 09:06:45,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:06:45,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:06:45,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:45,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:06:45,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:06:45,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:45" (1/1) ... [2023-04-01 09:06:45,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345c076b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:45, skipping insertion in model container [2023-04-01 09:06:45,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:45" (1/1) ... [2023-04-01 09:06:45,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:06:45,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:06:45,997 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/array-fpi/pcompf.c[589,602] [2023-04-01 09:06:46,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:46,035 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:06:46,044 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/array-fpi/pcompf.c[589,602] [2023-04-01 09:06:46,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:46,075 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:06:46,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46 WrapperNode [2023-04-01 09:06:46,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:46,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:06:46,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:06:46,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:06:46,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:06:46,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:06:46,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:06:46,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:06:46,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (1/1) ... [2023-04-01 09:06:46,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:46,138 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 09:06:46,155 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 09:06:46,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:06:46,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:06:46,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:06:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:06:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:06:46,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:06:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:06:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:06:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:06:46,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:06:46,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:06:46,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:06:46,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:06:46,251 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:06:46,253 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:06:46,432 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:06:46,457 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:06:46,457 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 09:06:46,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:46 BoogieIcfgContainer [2023-04-01 09:06:46,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:06:46,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:06:46,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:06:46,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:06:46,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:06:45" (1/3) ... [2023-04-01 09:06:46,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c97595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:46, skipping insertion in model container [2023-04-01 09:06:46,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:46" (2/3) ... [2023-04-01 09:06:46,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c97595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:46, skipping insertion in model container [2023-04-01 09:06:46,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:46" (3/3) ... [2023-04-01 09:06:46,465 INFO L112 eAbstractionObserver]: Analyzing ICFG pcompf.c [2023-04-01 09:06:46,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:06:46,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:06:46,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:06:46,513 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;@69358d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:06:46,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:06:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:06:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:06:46,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:46,539 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 09:06:46,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:46,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1332920094, now seen corresponding path program 1 times [2023-04-01 09:06:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093611232] [2023-04-01 09:06:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:46,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:46,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036076513] [2023-04-01 09:06:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:46,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:46,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:46,645 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 09:06:46,646 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 09:06:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:46,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 09:06:46,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:46,876 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-04-01 09:06:46,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-04-01 09:06:46,903 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 8 treesize of output 7 [2023-04-01 09:06:46,922 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 8 treesize of output 7 [2023-04-01 09:06:46,946 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 8 treesize of output 7 [2023-04-01 09:06:47,416 INFO L321 Elim1Store]: treesize reduction 22, result has 55.1 percent of original size [2023-04-01 09:06:47,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 191 [2023-04-01 09:06:47,553 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 09:06:47,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:47,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:47,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093611232] [2023-04-01 09:06:47,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036076513] [2023-04-01 09:06:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036076513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:47,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:47,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 09:06:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828314683] [2023-04-01 09:06:47,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 09:06:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 09:06:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:06:47,579 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:47,674 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-04-01 09:06:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:06:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:06:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:47,681 INFO L225 Difference]: With dead ends: 56 [2023-04-01 09:06:47,681 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 09:06:47,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:06:47,690 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:47,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 86 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 09:06:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-04-01 09:06:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:06:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-04-01 09:06:47,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 18 [2023-04-01 09:06:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:47,722 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-04-01 09:06:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-04-01 09:06:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:06:47,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:47,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:47,731 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 09:06:47,928 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,SelfDestructingSolverStorable0 [2023-04-01 09:06:47,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:47,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash -435083052, now seen corresponding path program 1 times [2023-04-01 09:06:47,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:47,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657479349] [2023-04-01 09:06:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:47,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:47,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042401917] [2023-04-01 09:06:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:47,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:47,971 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 09:06:47,974 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 09:06:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:48,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:48,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:48,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:48,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657479349] [2023-04-01 09:06:48,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042401917] [2023-04-01 09:06:48,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042401917] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937823978] [2023-04-01 09:06:48,148 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:48,148 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:48,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:48,156 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:48,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:48,279 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:06:48,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 79 for LOIs [2023-04-01 09:06:48,812 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:06:48,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:48,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:50,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (exists ((v_main_~c~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_1) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= v_main_~c~0.base_BEFORE_CALL_1 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int)))) (and (= (select |v_old(#length)_BEFORE_CALL_3| 2) 9) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| v_main_~a~0.base_BEFORE_CALL_1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)))) (<= ~N~0 1) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:50,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:50,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 09:06:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331630135] [2023-04-01 09:06:50,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:50,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 09:06:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 09:06:50,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:06:50,153 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:50,238 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-04-01 09:06:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:06:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 09:06:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:50,240 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:06:50,240 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 09:06:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:06:50,242 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:50,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 58 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:06:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 09:06:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-04-01 09:06:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:06:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-04-01 09:06:50,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2023-04-01 09:06:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:50,248 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-04-01 09:06:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-04-01 09:06:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:06:50,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:50,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:50,257 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 09:06:50,454 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,SelfDestructingSolverStorable1 [2023-04-01 09:06:50,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:50,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:50,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1066334427, now seen corresponding path program 1 times [2023-04-01 09:06:50,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:50,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773829050] [2023-04-01 09:06:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:50,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895856735] [2023-04-01 09:06:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:50,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:50,483 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 09:06:50,484 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 09:06:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:50,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:50,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:50,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:50,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773829050] [2023-04-01 09:06:50,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:50,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895856735] [2023-04-01 09:06:50,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895856735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:50,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:50,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:06:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563471786] [2023-04-01 09:06:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:06:50,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:06:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:06:50,567 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:50,621 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-04-01 09:06:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:06:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 09:06:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:50,623 INFO L225 Difference]: With dead ends: 57 [2023-04-01 09:06:50,624 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 09:06:50,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:06:50,629 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:50,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:06:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 09:06:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-04-01 09:06:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:06:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 09:06:50,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2023-04-01 09:06:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:50,645 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 09:06:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 09:06:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:06:50,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:50,646 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 09:06:50,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 09:06:50,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:50,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:50,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 487378727, now seen corresponding path program 1 times [2023-04-01 09:06:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:50,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297690934] [2023-04-01 09:06:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:50,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:50,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087421074] [2023-04-01 09:06:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:50,875 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 09:06:50,903 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 09:06:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:50,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 09:06:50,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:51,073 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-04-01 09:06:51,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-04-01 09:06:51,087 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 8 treesize of output 7 [2023-04-01 09:06:51,098 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 8 treesize of output 7 [2023-04-01 09:06:51,107 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 8 treesize of output 7 [2023-04-01 09:06:51,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:51,408 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:51,417 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-04-01 09:06:51,418 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 275 [2023-04-01 09:06:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:51,481 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:51,484 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:51,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 17 [2023-04-01 09:06:51,498 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 14 treesize of output 12 [2023-04-01 09:06:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:51,562 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 09:06:51,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 113 [2023-04-01 09:06:51,599 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 09:06:51,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:06:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:51,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:51,738 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_221 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_221) c_main_~c~0.base) c_main_~c~0.offset) 0)) is different from false [2023-04-01 09:06:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 09:06:53,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297690934] [2023-04-01 09:06:53,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087421074] [2023-04-01 09:06:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087421074] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841877939] [2023-04-01 09:06:53,930 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:53,931 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:53,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:53,931 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:53,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:53,959 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:06:54,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 09:06:54,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:06:54,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:54,327 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:55,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '842#(and (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= 9 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_2) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)))) (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~c~0.base_BEFORE_CALL_2 Int)) (and (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_2) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_2 0)) (not (= v_main_~c~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)))) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:55,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:55,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2023-04-01 09:06:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628778233] [2023-04-01 09:06:55,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:55,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 09:06:55,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 09:06:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=960, Unknown=5, NotChecked=62, Total=1122 [2023-04-01 09:06:55,516 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 19 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:06:55,591 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_main_~c~0.base))) (and (forall ((v_ArrVal_221 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_221) c_main_~c~0.base) c_main_~c~0.offset) 0)) (not (= c_main_~b~0.base c_main_~c~0.base)) (= 0 (select .cse0 0)) (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_main_~a~0.base v_ArrVal_220) c_main_~b~0.base v_ArrVal_221) c_main_~c~0.base) c_main_~c~0.offset) 0)) (forall ((v_ArrVal_222 Int)) (= (select (store .cse0 (+ c_main_~c~0.offset (* c_main_~i~0 8)) v_ArrVal_222) c_main_~c~0.offset) 0)) (= c_main_~c~0.offset 0))) is different from false [2023-04-01 09:07:12,271 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_main_~c~0.base))) (and (not (= c_main_~b~0.base c_main_~c~0.base)) (= 0 (select .cse0 0)) (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_main_~a~0.base v_ArrVal_220) c_main_~b~0.base v_ArrVal_221) c_main_~c~0.base) c_main_~c~0.offset) 0)) (forall ((v_ArrVal_222 Int)) (= (select (store .cse0 (+ c_main_~c~0.offset (* c_main_~i~0 8)) v_ArrVal_222) c_main_~c~0.offset) 0)) (= c_main_~c~0.offset 0))) is different from false [2023-04-01 09:07:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:12,284 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 09:07:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 09:07:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-04-01 09:07:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:12,286 INFO L225 Difference]: With dead ends: 73 [2023-04-01 09:07:12,286 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 09:07:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=214, Invalid=1762, Unknown=16, NotChecked=264, Total=2256 [2023-04-01 09:07:12,287 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 33 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 132 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 240 Invalid, 27 Unknown, 166 Unchecked, 0.2s Time] [2023-04-01 09:07:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 09:07:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2023-04-01 09:07:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:07:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-04-01 09:07:12,296 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 21 [2023-04-01 09:07:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:12,296 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-04-01 09:07:12,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-04-01 09:07:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:07:12,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:12,297 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:12,307 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 09:07:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:12,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:12,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1291640729, now seen corresponding path program 2 times [2023-04-01 09:07:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60991857] [2023-04-01 09:07:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:12,515 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:12,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35971219] [2023-04-01 09:07:12,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:12,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:12,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:12,516 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 09:07:12,518 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 09:07:12,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:07:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:12,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:07:12,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:12,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:12,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:12,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60991857] [2023-04-01 09:07:12,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:12,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35971219] [2023-04-01 09:07:12,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35971219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:12,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341903054] [2023-04-01 09:07:12,714 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:07:12,714 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:12,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:12,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:12,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:12,765 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:07:13,079 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 09:07:13,103 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:07:13,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:13,114 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:14,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1226#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (= 9 (select |v_old(#length)_BEFORE_CALL_11| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_3) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (exists ((v_main_~c~0.base_BEFORE_CALL_3 Int)) (and (not (= v_main_~c~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_3) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_3 0)))) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:14,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:14,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:14,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-04-01 09:07:14,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852150143] [2023-04-01 09:07:14,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:14,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:07:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:07:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-04-01 09:07:14,131 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:14,536 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2023-04-01 09:07:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 09:07:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 09:07:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:14,537 INFO L225 Difference]: With dead ends: 118 [2023-04-01 09:07:14,537 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 09:07:14,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:07:14,539 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:14,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:07:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 09:07:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 50. [2023-04-01 09:07:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.3) internal successors, (52), 41 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:07:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2023-04-01 09:07:14,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 23 [2023-04-01 09:07:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:14,547 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2023-04-01 09:07:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2023-04-01 09:07:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:07:14,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:14,548 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:14,555 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 09:07:14,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:14,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:14,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:14,755 INFO L85 PathProgramCache]: Analyzing trace with hash 575678599, now seen corresponding path program 3 times [2023-04-01 09:07:14,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:14,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368622485] [2023-04-01 09:07:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:14,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:14,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:14,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063002851] [2023-04-01 09:07:14,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:07:14,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:14,792 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 09:07:14,793 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 09:07:14,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:07:14,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:14,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:14,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:07:14,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:07:14,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368622485] [2023-04-01 09:07:14,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063002851] [2023-04-01 09:07:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063002851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:14,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49884646] [2023-04-01 09:07:14,892 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:07:14,893 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:14,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:14,893 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:14,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:14,925 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:07:15,226 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 09:07:15,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:07:15,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:15,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:16,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1694#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~c~0.base_BEFORE_CALL_4 Int)) (and (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_4) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)) (not (= v_main_~c~0.base_BEFORE_CALL_4 0)))) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_4) 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:16,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:16,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:16,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 09:07:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252610567] [2023-04-01 09:07:16,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:07:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:07:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:07:16,214 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:16,364 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2023-04-01 09:07:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:07:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 09:07:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:16,365 INFO L225 Difference]: With dead ends: 82 [2023-04-01 09:07:16,365 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 09:07:16,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:07:16,366 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:16,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 09:07:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2023-04-01 09:07:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:07:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-04-01 09:07:16,396 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 23 [2023-04-01 09:07:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:16,396 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-04-01 09:07:16,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-04-01 09:07:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:07:16,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:16,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:16,401 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 09:07:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:16,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:16,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 762700478, now seen corresponding path program 4 times [2023-04-01 09:07:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304088116] [2023-04-01 09:07:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:16,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:16,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699884846] [2023-04-01 09:07:16,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:07:16,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:16,636 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 09:07:16,638 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 09:07:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:16,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 09:07:16,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:16,716 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 14 treesize of output 12 [2023-04-01 09:07:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:16,731 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 09:07:16,731 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 1 case distinctions, treesize of input 17 treesize of output 23 [2023-04-01 09:07:16,734 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 8 treesize of output 7 [2023-04-01 09:07:16,745 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 14 treesize of output 16 [2023-04-01 09:07:16,754 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 14 treesize of output 16 [2023-04-01 09:07:16,775 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 09:07:16,785 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 09:07:16,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:07:16,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:16,831 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 21 treesize of output 20 [2023-04-01 09:07:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:07:16,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:07:19,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:19,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304088116] [2023-04-01 09:07:19,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699884846] [2023-04-01 09:07:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699884846] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055477965] [2023-04-01 09:07:19,137 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:07:19,137 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:19,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:19,137 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:19,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:19,177 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:07:19,473 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 09:07:19,494 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:07:19,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:19,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:20,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2095#(and (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (= 9 (select |v_old(#length)_BEFORE_CALL_19| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_5) 0) (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_5 2)) (= (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_5 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= 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))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~c~0.base_BEFORE_CALL_5 Int)) (and (not (= v_main_~c~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_5) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_5 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:20,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:20,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-04-01 09:07:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751648414] [2023-04-01 09:07:20,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:20,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 09:07:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 09:07:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1134, Unknown=17, NotChecked=0, Total=1260 [2023-04-01 09:07:20,605 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:20,849 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-04-01 09:07:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:07:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-04-01 09:07:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:20,850 INFO L225 Difference]: With dead ends: 57 [2023-04-01 09:07:20,850 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 09:07:20,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=160, Invalid=1463, Unknown=17, NotChecked=0, Total=1640 [2023-04-01 09:07:20,851 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:20,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 09:07:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2023-04-01 09:07:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:07:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-04-01 09:07:20,858 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 24 [2023-04-01 09:07:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:20,858 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-04-01 09:07:20,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-04-01 09:07:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:07:20,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:20,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:20,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:21,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:21,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:21,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2021903161, now seen corresponding path program 1 times [2023-04-01 09:07:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:21,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575312338] [2023-04-01 09:07:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:21,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:21,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973025040] [2023-04-01 09:07:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:21,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:21,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:07:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:21,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 09:07:21,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:21,541 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2023-04-01 09:07:21,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2023-04-01 09:07:21,581 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 0 case distinctions, treesize of input 37 treesize of output 33 [2023-04-01 09:07:21,617 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 17 treesize of output 15 [2023-04-01 09:07:21,656 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 17 treesize of output 15 [2023-04-01 09:07:21,737 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 17 treesize of output 15 [2023-04-01 09:07:22,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:22,576 INFO L321 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-04-01 09:07:22,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 438 treesize of output 670 [2023-04-01 09:07:23,191 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:23,209 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:23,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 404 [2023-04-01 09:07:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:23,407 INFO L321 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2023-04-01 09:07:23,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 15 case distinctions, treesize of input 1171 treesize of output 1181 [2023-04-01 09:07:24,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 69 [2023-04-01 09:07:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:24,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,374 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-04-01 09:07:24,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 223 [2023-04-01 09:07:24,554 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 0 case distinctions, treesize of input 284 treesize of output 290 [2023-04-01 09:07:24,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-04-01 09:07:24,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-04-01 09:07:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:24,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 11 [2023-04-01 09:07:24,838 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:07:24,838 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 23 treesize of output 19 [2023-04-01 09:07:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:24,884 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:07:24,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2023-04-01 09:07:24,934 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:07:24,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:07:24,954 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:07:24,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:07:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:25,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:27,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575312338] [2023-04-01 09:07:27,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973025040] [2023-04-01 09:07:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973025040] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148704690] [2023-04-01 09:07:27,241 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:07:27,241 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:27,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:27,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:27,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:27,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:07:28,113 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:07:28,288 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:07:28,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:28,296 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:30,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2479#(and (exists ((v_main_~a~0.offset_BEFORE_CALL_16 Int) (|v_old(#valid)_BEFORE_CALL_33| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_22 Int) (v_main_~a~0.base_BEFORE_CALL_16 Int) (|v_old(#length)_BEFORE_CALL_33| (Array Int Int)) (|v_old(~N~0)_BEFORE_CALL_33| Int) (v_main_~c~0.offset_BEFORE_CALL_18 Int) (|v_old(#memory_int)_BEFORE_CALL_33| (Array Int (Array Int Int))) (v_main_~b~0.offset_BEFORE_CALL_16 Int) (v_main_~c~0.base_BEFORE_CALL_18 Int) (v_main_~b~0.base_BEFORE_CALL_16 Int) (|v_main_#t~mem17_BEFORE_CALL_21| Int)) (and (not (= |v_main_#t~mem17_BEFORE_CALL_21| (* v_main_~i~0_BEFORE_CALL_22 v_main_~i~0_BEFORE_CALL_22))) (or (and (= (select |v_old(#valid)_BEFORE_CALL_33| 2) 1) (not (= |v_old(#valid)_BEFORE_CALL_33| (select |v_old(#memory_int)_BEFORE_CALL_33| 1))) (= (select |v_old(#length)_BEFORE_CALL_33| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_33| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_33| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_33| 1) 1) 0) (= |v_main_#t~mem17_BEFORE_CALL_21| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_18) (* v_main_~i~0_BEFORE_CALL_22 8))) (not (= v_main_~a~0.base_BEFORE_CALL_16 2)) (= |v_old(~N~0)_BEFORE_CALL_33| 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 |#StackHeapBarrier|)) (= v_main_~b~0.offset_BEFORE_CALL_16 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 1)) (= (select |v_old(#valid)_BEFORE_CALL_33| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_33| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_33| v_main_~a~0.base_BEFORE_CALL_16) 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 3)) (= v_main_~c~0.offset_BEFORE_CALL_18 0) (not (= |#StackHeapBarrier| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_33| 1) 0) 48) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_16)) (= v_main_~a~0.offset_BEFORE_CALL_16 0) (not (= (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_18) (select |v_old(#memory_int)_BEFORE_CALL_33| 1))) (not (= v_main_~i~0_BEFORE_CALL_22 ~N~0)) (not (= |v_old(#length)_BEFORE_CALL_33| (select |v_old(#memory_int)_BEFORE_CALL_33| 1))) (not (= v_main_~b~0.base_BEFORE_CALL_16 0)) (not (= v_main_~a~0.base_BEFORE_CALL_16 0)) (= |#NULL.offset| 0) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_18)) (not (= v_main_~c~0.base_BEFORE_CALL_18 0)) (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_18) 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_33| |v_old(#length)_BEFORE_CALL_33|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_33| 3)) (= |#NULL.base| 0)) (and (= |v_main_#t~mem17_BEFORE_CALL_21| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_18) 0)) (= (select |v_old(#valid)_BEFORE_CALL_33| 2) 1) (not (= |v_old(#valid)_BEFORE_CALL_33| (select |v_old(#memory_int)_BEFORE_CALL_33| 1))) (= (select |v_old(#length)_BEFORE_CALL_33| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_33| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_33| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_33| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 2)) (= |v_old(~N~0)_BEFORE_CALL_33| 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 |#StackHeapBarrier|)) (= v_main_~b~0.offset_BEFORE_CALL_16 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 1)) (= (select |v_old(#valid)_BEFORE_CALL_33| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_33| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_33| v_main_~a~0.base_BEFORE_CALL_16) 0) (not (= v_main_~a~0.base_BEFORE_CALL_16 3)) (not (= ~N~0 0)) (= v_main_~c~0.offset_BEFORE_CALL_18 0) (not (= |#StackHeapBarrier| 0)) (= v_main_~i~0_BEFORE_CALL_22 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_33| 1) 0) 48) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_16)) (= v_main_~a~0.offset_BEFORE_CALL_16 0) (not (= |v_old(#length)_BEFORE_CALL_33| (select |v_old(#memory_int)_BEFORE_CALL_33| 1))) (not (= v_main_~b~0.base_BEFORE_CALL_16 0)) (not (= v_main_~a~0.base_BEFORE_CALL_16 0)) (= |#NULL.offset| 0) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_18)) (not (= v_main_~c~0.base_BEFORE_CALL_18 0)) (not (= |v_old(#valid)_BEFORE_CALL_33| |v_old(#length)_BEFORE_CALL_33|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_33| 3)) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 09:07:30,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:30,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-04-01 09:07:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508471427] [2023-04-01 09:07:30,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:07:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:07:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1586, Unknown=11, NotChecked=0, Total=1722 [2023-04-01 09:07:30,337 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:07:33,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:35,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 09:07:37,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:39,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 09:07:41,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:43,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:45,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:48,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-04-01 09:07:50,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 09:07:52,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-01 09:07:54,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-04-01 09:07:56,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]