/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-tiling/pnr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:51:09,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:51:09,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:51:09,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:51:09,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:51:09,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:51:09,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:51:09,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:51:09,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:51:09,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:51:09,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:51:09,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:51:09,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:51:09,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:51:09,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:51:09,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:51:09,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:51:09,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:51:09,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:51:09,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:51:09,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:51:09,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:51:09,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:51:09,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:51:09,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:51:09,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:51:09,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:51:09,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:51:09,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:51:09,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:51:09,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:51:09,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:51:09,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:51:09,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:51:09,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:51:09,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:51:09,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:51:09,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:51:09,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:51:09,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:51:09,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:51:09,201 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 08:51:09,231 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:51:09,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:51:09,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:51:09,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:51:09,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:51:09,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:51:09,233 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:51:09,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:51:09,234 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:51:09,234 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:51:09,234 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:51:09,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:51:09,235 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:51:09,235 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:51:09,235 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:51:09,235 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:51:09,235 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:51:09,235 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:51:09,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:51:09,236 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:51:09,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:51:09,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:51:09,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:51:09,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:51:09,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:51:09,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:51:09,237 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:51:09,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:51:09,238 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:51:09,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:51:09,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:51:09,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:51:09,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:51:09,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:51:09,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:51:09,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:51:09,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:51:09,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:51:09,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:51:09,496 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:51:09,496 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:51:09,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2023-04-01 08:51:10,644 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:51:10,815 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:51:10,815 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2023-04-01 08:51:10,820 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96662ae16/6ab2562bfacf4cb5a69468dd39f6edd4/FLAG17abb5ddb [2023-04-01 08:51:10,833 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96662ae16/6ab2562bfacf4cb5a69468dd39f6edd4 [2023-04-01 08:51:10,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:51:10,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:51:10,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:51:10,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:51:10,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:51:10,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:51:10" (1/1) ... [2023-04-01 08:51:10,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e77347d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:10, skipping insertion in model container [2023-04-01 08:51:10,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:51:10" (1/1) ... [2023-04-01 08:51:10,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:51:10,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:51:11,003 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-tiling/pnr5.c[395,408] [2023-04-01 08:51:11,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:51:11,036 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:51:11,047 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-tiling/pnr5.c[395,408] [2023-04-01 08:51:11,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:51:11,067 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:51:11,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11 WrapperNode [2023-04-01 08:51:11,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:51:11,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:51:11,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:51:11,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:51:11,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:51:11,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:51:11,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:51:11,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:51:11,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (1/1) ... [2023-04-01 08:51:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:51:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:11,150 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 08:51:11,182 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 08:51:11,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:51:11,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:51:11,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:51:11,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:51:11,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:51:11,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-04-01 08:51:11,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:51:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:51:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:51:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:51:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:51:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:51:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:51:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:51:11,304 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:51:11,307 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:51:11,552 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:51:11,637 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:51:11,637 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 08:51:11,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:51:11 BoogieIcfgContainer [2023-04-01 08:51:11,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:51:11,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:51:11,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:51:11,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:51:11,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:51:10" (1/3) ... [2023-04-01 08:51:11,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1c3e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:51:11, skipping insertion in model container [2023-04-01 08:51:11,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:11" (2/3) ... [2023-04-01 08:51:11,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1c3e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:51:11, skipping insertion in model container [2023-04-01 08:51:11,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:51:11" (3/3) ... [2023-04-01 08:51:11,659 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr5.c [2023-04-01 08:51:11,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:51:11,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:51:11,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:51:11,737 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;@73a83dad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:51:11,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:51:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 08:51:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 08:51:11,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:11,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:11,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:11,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2114998606, now seen corresponding path program 1 times [2023-04-01 08:51:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994049491] [2023-04-01 08:51:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:12,264 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 08:51:12,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994049491] [2023-04-01 08:51:12,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994049491] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:51:12,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:51:12,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 08:51:12,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900166841] [2023-04-01 08:51:12,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:51:12,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 08:51:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 08:51:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:51:12,310 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:51:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:12,513 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-04-01 08:51:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:51:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 08:51:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:12,521 INFO L225 Difference]: With dead ends: 72 [2023-04-01 08:51:12,522 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 08:51:12,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:51:12,527 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:12,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:51:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 08:51:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-04-01 08:51:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:51:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 08:51:12,571 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 17 [2023-04-01 08:51:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:12,571 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 08:51:12,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:51:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 08:51:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 08:51:12,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:12,573 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:51:12,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:12,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1380864962, now seen corresponding path program 1 times [2023-04-01 08:51:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491977041] [2023-04-01 08:51:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 08:51:14,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:14,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491977041] [2023-04-01 08:51:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491977041] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96690542] [2023-04-01 08:51:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:14,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:14,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:14,837 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 08:51:14,902 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 08:51:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:14,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-01 08:51:14,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:15,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:51:15,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:51:15,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 08:51:15,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 08:51:15,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-04-01 08:51:15,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-04-01 08:51:15,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:15,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-04-01 08:51:15,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2023-04-01 08:51:15,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:15,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-04-01 08:51:15,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2023-04-01 08:51:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-04-01 08:51:15,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-04-01 08:51:15,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:15,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-04-01 08:51:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-04-01 08:51:15,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-04-01 08:51:15,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-04-01 08:51:15,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:15,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2023-04-01 08:51:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 08:51:16,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:16,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:16,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 08:51:16,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:16,351 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 36 treesize of output 35 [2023-04-01 08:51:16,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:16,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2023-04-01 08:51:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 08:51:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96690542] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845036614] [2023-04-01 08:51:16,587 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 08:51:16,587 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:16,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:16,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:16,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:16,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 08:51:26,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-04-01 08:51:26,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 100 for LOIs [2023-04-01 08:51:26,493 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 21 for LOIs [2023-04-01 08:51:26,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:51:26,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:30,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '450#(and (= (mod ~SIZE~0 5) 0) (exists ((|v_old(#valid)_BEFORE_CALL_86| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_94 Int) (|v_old(#length)_BEFORE_CALL_86| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_86| (Array Int (Array Int Int)))) (and (not (= |v_old(#valid)_BEFORE_CALL_86| |v_old(#length)_BEFORE_CALL_86|)) (not (= v_main_~a~0.base_BEFORE_CALL_94 1)) (= (select |v_old(#valid)_BEFORE_CALL_86| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_86| 1) 0) 48) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_86| v_main_~a~0.base_BEFORE_CALL_94) 0) (= (select |v_old(#valid)_BEFORE_CALL_86| 2) 1) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_86| 1) |v_old(#length)_BEFORE_CALL_86|)) (not (= |v_old(#valid)_BEFORE_CALL_86| (select |v_old(#memory_int)_BEFORE_CALL_86| 1))) (not (= |v_old(#length)_BEFORE_CALL_86| (select |v_old(#memory_int)_BEFORE_CALL_86| 2))) (= (select |v_old(#valid)_BEFORE_CALL_86| 1) 1) (not (= |v_old(#valid)_BEFORE_CALL_86| (select |v_old(#memory_int)_BEFORE_CALL_86| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_86| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_86| 1) (select |v_old(#memory_int)_BEFORE_CALL_86| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_94 2)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_94) 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_94 3)) (= (select |v_old(#length)_BEFORE_CALL_86| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_86| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_94 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_94 0)) (= 53 (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 3)) (= (select |v_old(#length)_BEFORE_CALL_86| 1) 2) (= (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 1) 110) (= (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 6) 0) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_86| 2) 5) 99) (= 7 (select |v_old(#length)_BEFORE_CALL_86| 2)))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (< 0 ~SIZE~0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:30,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:30,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:30,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 12] total 31 [2023-04-01 08:51:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731656640] [2023-04-01 08:51:30,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:30,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 08:51:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:30,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 08:51:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2468, Unknown=4, NotChecked=0, Total=2756 [2023-04-01 08:51:30,039 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-04-01 08:51:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:30,995 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-04-01 08:51:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 08:51:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 38 [2023-04-01 08:51:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:30,997 INFO L225 Difference]: With dead ends: 70 [2023-04-01 08:51:30,997 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 08:51:30,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=547, Invalid=4005, Unknown=4, NotChecked=0, Total=4556 [2023-04-01 08:51:31,001 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:31,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 179 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 08:51:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 08:51:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2023-04-01 08:51:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 08:51:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2023-04-01 08:51:31,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 38 [2023-04-01 08:51:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:31,014 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2023-04-01 08:51:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 14 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2023-04-01 08:51:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2023-04-01 08:51:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 08:51:31,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:31,016 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:31,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:51:31,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:31,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:31,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2052054259, now seen corresponding path program 1 times [2023-04-01 08:51:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070761658] [2023-04-01 08:51:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 08:51:32,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070761658] [2023-04-01 08:51:32,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070761658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:32,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988302137] [2023-04-01 08:51:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:32,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:32,050 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 08:51:32,054 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 08:51:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:32,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 08:51:32,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:32,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 39 [2023-04-01 08:51:32,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 08:51:32,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 08:51:32,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 08:51:32,392 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 08:51:32,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-04-01 08:51:32,399 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 16 treesize of output 12 [2023-04-01 08:51:32,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 08:51:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 08:51:32,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:32,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:32,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 08:51:32,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:32,813 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 39 treesize of output 36 [2023-04-01 08:51:32,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:32,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 34 [2023-04-01 08:51:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 08:51:33,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988302137] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:33,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525610235] [2023-04-01 08:51:33,054 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-04-01 08:51:33,054 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:33,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:33,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:33,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:33,124 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 08:51:42,542 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 135 for LOIs [2023-04-01 08:51:42,816 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 100 for LOIs [2023-04-01 08:51:42,834 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 21 for LOIs [2023-04-01 08:51:42,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:51:42,842 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:51,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1065#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (and (= (mod ~SIZE~0 5) 0) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (not (= |#StackHeapBarrier| 0)) (exists ((v_main_~a~0.base_BEFORE_CALL_208 Int) (|v_old(#valid)_BEFORE_CALL_192| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_192| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_199 Int) (|v_old(#memory_int)_BEFORE_CALL_192| (Array Int (Array Int Int)))) (and (= (select |v_old(#length)_BEFORE_CALL_192| 2) 7) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_199)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_192| |v_old(#length)_BEFORE_CALL_192|)) (= (select |v_old(#length)_BEFORE_CALL_192| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_192| (select |v_old(#memory_int)_BEFORE_CALL_192| 1))) (= (select |v_old(#valid)_BEFORE_CALL_192| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) |v_old(#length)_BEFORE_CALL_192|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 1) |v_old(#length)_BEFORE_CALL_192|)) (= (select |v_old(#length)_BEFORE_CALL_192| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_208 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 2) 114) (not (= v_main_~a~0.base_BEFORE_CALL_208 |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) |v_old(#valid)_BEFORE_CALL_192|)) (= (select |v_old(#valid)_BEFORE_CALL_192| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_208 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 5) 99) (not (= v_main_~a~0.base_BEFORE_CALL_208 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 1) 110) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 6) 0) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_208) (* v_main_~i~0_BEFORE_CALL_199 4)) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) (select |v_old(#memory_int)_BEFORE_CALL_192| 1))) (not (= |v_old(#valid)_BEFORE_CALL_192| (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_208))) (= (select |v_old(#valid)_BEFORE_CALL_192| v_main_~a~0.base_BEFORE_CALL_208) 0) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_208) 0) 0)) (= (select |v_old(#valid)_BEFORE_CALL_192| 3) 1) (= 53 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 3)) (= (select |v_old(#valid)_BEFORE_CALL_192| 1) 1) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 4)) (not (= v_main_~a~0.base_BEFORE_CALL_208 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 1) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= (mod ~SIZE~0 5) 0) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_208 Int) (|v_old(#valid)_BEFORE_CALL_192| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_192| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_192| (Array Int (Array Int Int)))) (and (= (select |v_old(#length)_BEFORE_CALL_192| 2) 7) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_192| |v_old(#length)_BEFORE_CALL_192|)) (= (select |v_old(#length)_BEFORE_CALL_192| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_192| (select |v_old(#memory_int)_BEFORE_CALL_192| 1))) (= (select |v_old(#valid)_BEFORE_CALL_192| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) |v_old(#length)_BEFORE_CALL_192|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 1) |v_old(#length)_BEFORE_CALL_192|)) (= (select |v_old(#length)_BEFORE_CALL_192| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_208 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 2) 114) (not (= v_main_~a~0.base_BEFORE_CALL_208 |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) |v_old(#valid)_BEFORE_CALL_192|)) (= (select |v_old(#valid)_BEFORE_CALL_192| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_208 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 5) 99) (not (= v_main_~a~0.base_BEFORE_CALL_208 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 1) 110) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 0)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_208) 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 6) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_192| 2) (select |v_old(#memory_int)_BEFORE_CALL_192| 1))) (= (select |v_old(#valid)_BEFORE_CALL_192| v_main_~a~0.base_BEFORE_CALL_208) 0) (= (select |v_old(#valid)_BEFORE_CALL_192| 3) 1) (= 53 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 3)) (= (select |v_old(#valid)_BEFORE_CALL_192| 1) 1) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_192| 2) 4)) (not (= v_main_~a~0.base_BEFORE_CALL_208 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_192| 1) 1) 0))) (= |#NULL.base| 0))))' at error location [2023-04-01 08:51:51,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:51,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:51,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 37 [2023-04-01 08:51:51,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501858739] [2023-04-01 08:51:51,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 08:51:51,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 08:51:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3354, Unknown=7, NotChecked=0, Total=3660 [2023-04-01 08:51:51,451 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) [2023-04-01 08:51:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:53,227 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2023-04-01 08:51:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 08:51:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) Word has length 59 [2023-04-01 08:51:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:53,231 INFO L225 Difference]: With dead ends: 123 [2023-04-01 08:51:53,231 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 08:51:53,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=758, Invalid=6375, Unknown=7, NotChecked=0, Total=7140 [2023-04-01 08:51:53,234 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 381 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 323 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 08:51:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 08:51:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2023-04-01 08:51:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 08:51:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-04-01 08:51:53,257 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 59 [2023-04-01 08:51:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:53,258 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-04-01 08:51:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 20 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (28), 19 states have call predecessors, (28), 18 states have call successors, (28) [2023-04-01 08:51:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-04-01 08:51:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 08:51:53,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:53,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:53,267 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 08:51:53,465 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,SelfDestructingSolverStorable2 [2023-04-01 08:51:53,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:53,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1428831870, now seen corresponding path program 2 times [2023-04-01 08:51:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081745548] [2023-04-01 08:51:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 08:51:53,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:53,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081745548] [2023-04-01 08:51:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081745548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:53,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754306918] [2023-04-01 08:51:53,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:51:53,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:53,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:53,916 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 08:51:53,936 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 08:51:54,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 08:51:54,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:51:54,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 08:51:54,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:54,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2023-04-01 08:51:54,140 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 08:51:54,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-04-01 08:51:54,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3