/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops/matrix-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:58:36,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:58:36,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:58:36,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:58:36,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:58:36,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:58:36,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:58:36,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:58:36,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:58:36,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:58:36,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:58:36,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:58:36,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:58:36,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:58:36,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:58:36,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:58:36,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:58:36,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:58:36,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:58:36,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:58:36,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:58:36,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:58:36,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:58:36,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:58:36,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:58:36,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:58:36,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:58:36,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:58:36,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:58:36,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:58:36,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:58:36,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:58:36,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:58:36,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:58:36,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:58:36,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:58:36,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:58:36,236 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:58:36,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:58:36,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:58:36,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:58:36,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:58:36,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:58:36,238 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:58:36,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:58:36,238 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:58:36,239 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:58:36,239 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:58:36,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:58:36,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:58:36,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:58:36,240 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:58:36,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:58:36,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:58:36,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:58:36,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:58:36,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:58:36,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:58:36,242 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:58:36,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:58:36,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:58:36,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:58:36,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:58:36,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:58:36,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:36,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:58:36,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:58:36,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:58:36,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:58:36,244 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:58:36,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:58:36,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:58:36,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:58:36,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:58:36,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:58:36,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:58:36,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:58:36,492 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:58:36,493 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:58:36,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/matrix-1.c [2023-04-01 04:58:37,650 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:58:37,879 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:58:37,879 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-1.c [2023-04-01 04:58:37,885 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1ec315b/a2b94cb0009e40b48c4c4e0467e80303/FLAG8054041c0 [2023-04-01 04:58:37,901 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1ec315b/a2b94cb0009e40b48c4c4e0467e80303 [2023-04-01 04:58:37,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:58:37,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:58:37,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:37,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:58:37,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:58:37,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:37" (1/1) ... [2023-04-01 04:58:37,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1fbeda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:37, skipping insertion in model container [2023-04-01 04:58:37,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:37" (1/1) ... [2023-04-01 04:58:37,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:58:37,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:58:38,078 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-1.c[320,333] [2023-04-01 04:58:38,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:38,100 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:58:38,110 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-1.c[320,333] [2023-04-01 04:58:38,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:38,132 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:58:38,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38 WrapperNode [2023-04-01 04:58:38,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:38,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:58:38,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:58:38,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:58:38,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,172 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:58:38,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:58:38,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:58:38,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:58:38,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (1/1) ... [2023-04-01 04:58:38,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:38,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:58:38,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:58:38,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:58:38,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:58:38,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:58:38,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:58:38,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:58:38,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:58:38,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:58:38,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:58:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:58:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:58:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:58:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:58:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:58:38,298 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:58:38,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:58:38,493 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:58:38,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:58:38,573 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:58:38,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:38 BoogieIcfgContainer [2023-04-01 04:58:38,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:58:38,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:58:38,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:58:38,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:58:38,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:58:37" (1/3) ... [2023-04-01 04:58:38,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd08a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:38, skipping insertion in model container [2023-04-01 04:58:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:38" (2/3) ... [2023-04-01 04:58:38,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd08a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:38, skipping insertion in model container [2023-04-01 04:58:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:38" (3/3) ... [2023-04-01 04:58:38,584 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix-1.c [2023-04-01 04:58:38,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:58:38,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:58:38,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:58:38,652 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;@1c092d7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:58:38,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:58:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:58:38,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:38,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:38,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:38,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:38,666 INFO L85 PathProgramCache]: Analyzing trace with hash -322953119, now seen corresponding path program 1 times [2023-04-01 04:58:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:38,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792713796] [2023-04-01 04:58:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:38,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:38,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 04:58:38,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5716244] [2023-04-01 04:58:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:38,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:38,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:58:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:38,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:58:38,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:38,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:58:38,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:38,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792713796] [2023-04-01 04:58:38,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 04:58:38,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5716244] [2023-04-01 04:58:38,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5716244] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:58:38,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:58:38,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:58:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592590579] [2023-04-01 04:58:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:58:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:58:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:58:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:58:38,966 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:39,006 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 04:58:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:58:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 04:58:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:39,014 INFO L225 Difference]: With dead ends: 31 [2023-04-01 04:58:39,014 INFO L226 Difference]: Without dead ends: 14 [2023-04-01 04:58:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:58:39,024 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:39,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-01 04:58:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-04-01 04:58:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-01 04:58:39,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2023-04-01 04:58:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:39,062 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-01 04:58:39,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-01 04:58:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 04:58:39,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:39,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:39,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:39,270 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 04:58:39,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:39,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash -659482519, now seen corresponding path program 1 times [2023-04-01 04:58:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:39,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938418784] [2023-04-01 04:58:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:39,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:39,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 04:58:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708129595] [2023-04-01 04:58:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:39,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:39,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:39,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:58:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:39,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 04:58:39,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:39,398 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 04:58:39,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:58:39,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938418784] [2023-04-01 04:58:39,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 04:58:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708129595] [2023-04-01 04:58:39,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708129595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:58:39,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:58:39,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:58:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849882068] [2023-04-01 04:58:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:58:39,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:58:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:58:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:58:39,402 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:39,439 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-04-01 04:58:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:58:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 04:58:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:39,441 INFO L225 Difference]: With dead ends: 22 [2023-04-01 04:58:39,441 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 04:58:39,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:58:39,447 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:39,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 04:58:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-04-01 04:58:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-01 04:58:39,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-01 04:58:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:39,452 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-01 04:58:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:58:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-01 04:58:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:58:39,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:39,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:39,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:39,659 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 04:58:39,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:39,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash -787209655, now seen corresponding path program 1 times [2023-04-01 04:58:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:39,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726904625] [2023-04-01 04:58:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:39,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:39,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 04:58:39,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963198446] [2023-04-01 04:58:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:39,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:39,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:58:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:39,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 04:58:39,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:39,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:58:39,940 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 23 treesize of output 11 [2023-04-01 04:58:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:39,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:40,408 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 133 treesize of output 125 [2023-04-01 04:58:40,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:58:40,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 125 treesize of output 570 [2023-04-01 04:58:46,201 INFO L321 Elim1Store]: treesize reduction 1157, result has 22.2 percent of original size [2023-04-01 04:58:46,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 2707 treesize of output 4528 [2023-04-01 04:58:48,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:48,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:58:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:58:49,260 INFO L217 Elim1Store]: Index analysis took 286 ms [2023-04-01 04:58:49,792 INFO L321 Elim1Store]: treesize reduction 457, result has 1.3 percent of original size [2023-04-01 04:58:49,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 15 case distinctions, treesize of input 660 treesize of output 1100 [2023-04-01 04:58:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:50,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:50,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:50,888 INFO L217 Elim1Store]: Index analysis took 122 ms [2023-04-01 04:58:51,868 INFO L321 Elim1Store]: treesize reduction 565, result has 15.5 percent of original size [2023-04-01 04:58:51,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 18 case distinctions, treesize of input 749 treesize of output 1275 [2023-04-01 04:58:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:58:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:58:52,744 INFO L321 Elim1Store]: treesize reduction 7, result has 46.2 percent of original size [2023-04-01 04:58:52,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 223 treesize of output 204 [2023-04-01 04:58:54,004 INFO L321 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2023-04-01 04:58:54,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 14447410 treesize of output 8876682 [2023-04-01 04:58:56,242 INFO L321 Elim1Store]: treesize reduction 1158, result has 22.2 percent of original size [2023-04-01 04:58:56,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 857 treesize of output 3165 [2023-04-01 04:59:00,380 INFO L217 Elim1Store]: Index analysis took 978 ms