/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/nla-digbench-scaling/divbin2_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:45:43,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:45:43,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:45:43,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:45:43,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:45:43,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:45:43,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:45:43,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:45:43,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:45:43,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:45:43,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:45:43,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:45:43,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:45:43,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:45:43,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:45:43,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:45:43,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:45:43,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:45:43,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:45:43,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:45:43,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:45:43,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:45:43,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:45:43,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:45:43,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:45:43,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:45:43,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:45:43,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:45:43,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:45:43,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:45:43,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:45:43,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:45:43,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:45:43,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:45:43,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:45:43,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:45:43,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:45:43,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:45:43,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:45:43,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:45:43,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:45:43,222 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 [2023-04-02 22:45:43,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:45:43,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:45:43,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:45:43,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:45:43,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:45:43,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:45:43,252 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:45:43,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:45:43,253 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:45:43,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:45:43,253 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:45:43,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:45:43,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:45:43,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:45:43,254 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:45:43,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:45:43,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:45:43,254 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:45:43,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:45:43,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:45:43,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:45:43,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:45:43,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:45:43,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:45:43,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:45:43,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:45:43,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:45:43,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:45:43,478 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:45:43,478 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:45:43,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2023-04-02 22:45:44,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:45:44,929 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:45:44,929 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2023-04-02 22:45:44,935 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1136f33e9/71cdfa74731c4128afa4492e4d44ddb6/FLAG1e8cb3763 [2023-04-02 22:45:44,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1136f33e9/71cdfa74731c4128afa4492e4d44ddb6 [2023-04-02 22:45:44,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:45:44,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:45:44,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:45:44,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:45:44,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:45:44,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:45:44" (1/1) ... [2023-04-02 22:45:44,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c258b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:44, skipping insertion in model container [2023-04-02 22:45:44,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:45:44" (1/1) ... [2023-04-02 22:45:44,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:45:44,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:45:45,084 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/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2023-04-02 22:45:45,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:45:45,101 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:45:45,111 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/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2023-04-02 22:45:45,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:45:45,125 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:45:45,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45 WrapperNode [2023-04-02 22:45:45,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:45:45,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:45:45,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:45:45,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:45:45,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:45:45,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:45:45,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:45:45,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:45:45,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (1/1) ... [2023-04-02 22:45:45,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:45:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:45,176 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) [2023-04-02 22:45:45,181 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 [2023-04-02 22:45:45,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:45:45,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:45:45,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:45:45,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:45:45,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:45:45,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:45:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:45:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:45:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:45:45,262 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:45:45,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:45:45,375 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:45:45,412 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:45:45,412 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:45:45,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:45:45 BoogieIcfgContainer [2023-04-02 22:45:45,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:45:45,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:45:45,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:45:45,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:45:45,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:45:44" (1/3) ... [2023-04-02 22:45:45,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63188d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:45:45, skipping insertion in model container [2023-04-02 22:45:45,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:45:45" (2/3) ... [2023-04-02 22:45:45,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63188d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:45:45, skipping insertion in model container [2023-04-02 22:45:45,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:45:45" (3/3) ... [2023-04-02 22:45:45,423 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2023-04-02 22:45:45,438 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:45:45,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:45:45,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:45:45,490 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;@30e9c217, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:45:45,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:45:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 22:45:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:45:45,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:45,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:45:45,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:45,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:45,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2063405903, now seen corresponding path program 1 times [2023-04-02 22:45:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:45,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979615619] [2023-04-02 22:45:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:45,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979615619] [2023-04-02 22:45:45,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:45:45,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652864044] [2023-04-02 22:45:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:45,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:45,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:45,617 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) [2023-04-02 22:45:45,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:45:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:45,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:45:45,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:45,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:45:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652864044] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:45:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:45:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:45:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502292533] [2023-04-02 22:45:45,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:45:45,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:45:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:45:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:45:45,792 INFO L87 Difference]: Start difference. First operand has 25 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:45:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:45,816 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 22:45:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:45:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 22:45:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:45,823 INFO L225 Difference]: With dead ends: 39 [2023-04-02 22:45:45,824 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:45:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:45:45,829 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:45,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:45:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:45:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 22:45:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:45:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 22:45:45,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-04-02 22:45:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:45,864 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 22:45:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:45:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 22:45:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:45:45,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:45,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:45:45,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:45:46,069 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 [2023-04-02 22:45:46,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:46,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 775763039, now seen corresponding path program 1 times [2023-04-02 22:45:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:46,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395711912] [2023-04-02 22:45:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:46,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:46,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677714372] [2023-04-02 22:45:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:46,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:46,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:46,092 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) [2023-04-02 22:45:46,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:45:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:46,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 22:45:46,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:46,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:45:46,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395711912] [2023-04-02 22:45:46,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677714372] [2023-04-02 22:45:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677714372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:45:46,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:45:46,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 22:45:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648322177] [2023-04-02 22:45:46,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:45:46,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:45:46,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:45:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:45:46,404 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:45:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:46,502 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-02 22:45:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:45:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-04-02 22:45:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:46,504 INFO L225 Difference]: With dead ends: 33 [2023-04-02 22:45:46,504 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:45:46,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-02 22:45:46,507 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:46,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:45:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:45:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:45:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:45:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 22:45:46,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2023-04-02 22:45:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:46,522 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 22:45:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:45:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 22:45:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:45:46,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:46,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:45:46,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:45:46,729 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 [2023-04-02 22:45:46,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:46,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1098892102, now seen corresponding path program 1 times [2023-04-02 22:45:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:46,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933939738] [2023-04-02 22:45:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:46,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809682825] [2023-04-02 22:45:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:46,781 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) [2023-04-02 22:45:46,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:45:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:46,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 22:45:46,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:46,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:47,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933939738] [2023-04-02 22:45:47,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809682825] [2023-04-02 22:45:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809682825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620607593] [2023-04-02 22:45:47,215 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 22:45:47,215 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:47,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:47,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:47,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:47,290 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:47,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 22:45:47,438 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:47,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:47,453 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:47,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1620607593] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:45:47,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 7] total 23 [2023-04-02 22:45:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303519559] [2023-04-02 22:45:47,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:45:47,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 22:45:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 22:45:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:45:47,768 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:45:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:48,310 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-02 22:45:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 22:45:48,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-02 22:45:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:48,312 INFO L225 Difference]: With dead ends: 40 [2023-04-02 22:45:48,312 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 22:45:48,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-04-02 22:45:48,313 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:48,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:45:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 22:45:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-04-02 22:45:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:45:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 22:45:48,324 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2023-04-02 22:45:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:48,325 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 22:45:48,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:45:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 22:45:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 22:45:48,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:48,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:45:48,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 22:45:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:48,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:48,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 495415094, now seen corresponding path program 1 times [2023-04-02 22:45:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283695099] [2023-04-02 22:45:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:48,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088301355] [2023-04-02 22:45:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:48,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:48,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:48,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:45:48,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:45:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:48,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:45:48,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:48,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:45:48,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283695099] [2023-04-02 22:45:48,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088301355] [2023-04-02 22:45:48,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088301355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:45:48,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:45:48,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:45:48,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001577695] [2023-04-02 22:45:48,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:45:48,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:45:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:45:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:45:48,633 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:45:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:48,659 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-02 22:45:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:45:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-04-02 22:45:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:48,660 INFO L225 Difference]: With dead ends: 43 [2023-04-02 22:45:48,661 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:45:48,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:45:48,662 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:48,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:45:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:45:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:45:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:45:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 22:45:48,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2023-04-02 22:45:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:48,678 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 22:45:48,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:45:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 22:45:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:45:48,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:48,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:45:48,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:45:48,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:48,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:48,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:48,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1112955515, now seen corresponding path program 1 times [2023-04-02 22:45:48,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:48,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795519502] [2023-04-02 22:45:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:48,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:48,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557264199] [2023-04-02 22:45:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:48,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:48,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:48,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:45:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:45:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:45:48,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 22:45:48,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:49,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795519502] [2023-04-02 22:45:52,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557264199] [2023-04-02 22:45:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557264199] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331493459] [2023-04-02 22:45:52,476 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:45:52,476 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:52,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:52,476 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:52,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:52,494 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:52,697 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:45:52,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:52,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:52,759 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:54,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '891#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0_BEFORE_CALL_12 Int) (v_main_~A~0_BEFORE_CALL_18 Int) (v_main_~B~0_BEFORE_CALL_7 Int) (v_main_~r~0_BEFORE_CALL_11 Int) (v_main_~q~0_BEFORE_CALL_11 Int)) (and (not (= (mod v_main_~A~0_BEFORE_CALL_18 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_11 (* v_main_~q~0_BEFORE_CALL_11 v_main_~b~0_BEFORE_CALL_12)) 4294967296))) (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_11 v_main_~A~0_BEFORE_CALL_18) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_7 1) (= |#NULL.base| 0) (= v_main_~q~0_BEFORE_CALL_11 0)) (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~q~0_BEFORE_CALL_11 |#StackHeapBarrier|)) (<= 0 v_main_~q~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_7 1) (= |#NULL.base| 0))))))' at error location [2023-04-02 22:45:54,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:45:54,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-02 22:45:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815010364] [2023-04-02 22:45:54,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:45:54,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:45:54,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:45:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=603, Unknown=1, NotChecked=0, Total=702 [2023-04-02 22:45:54,468 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:46:01,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:03,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:05,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:07,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:16,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:20,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:29,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:34,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:35,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:46:36,832 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-04-02 22:46:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 22:46:36,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2023-04-02 22:46:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:46:36,834 INFO L225 Difference]: With dead ends: 67 [2023-04-02 22:46:36,834 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 22:46:36,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=165, Invalid=955, Unknown=2, NotChecked=0, Total=1122 [2023-04-02 22:46:36,835 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 25 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:46:36,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 132 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 25.2s Time] [2023-04-02 22:46:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 22:46:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-04-02 22:46:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:46:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-02 22:46:36,859 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2023-04-02 22:46:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:46:36,859 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-02 22:46:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:46:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-02 22:46:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 22:46:36,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:46:36,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:46:36,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 22:46:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:37,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:46:37,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:46:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1265077862, now seen corresponding path program 2 times [2023-04-02 22:46:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:46:37,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190922312] [2023-04-02 22:46:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:46:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:46:37,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:46:37,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969662796] [2023-04-02 22:46:37,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:46:37,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:46:37,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:46:37,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:46:37,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:46:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:46:37,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 22:46:37,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:46:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 22:46:37,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:46:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 22:46:37,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:46:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190922312] [2023-04-02 22:46:37,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:46:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969662796] [2023-04-02 22:46:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969662796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:46:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477067836] [2023-04-02 22:46:37,665 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:46:37,665 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:46:37,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:46:37,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:46:37,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:46:37,679 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:46:37,834 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:46:38,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:46:38,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:46:38,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:46:41,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1296#(and (exists ((v_main_~b~0_BEFORE_CALL_23 Int) (v_main_~r~0_BEFORE_CALL_18 Int) (v_main_~q~0_BEFORE_CALL_18 Int) (v_main_~A~0_BEFORE_CALL_29 Int) (v_main_~B~0_BEFORE_CALL_18 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~q~0_BEFORE_CALL_18 |#StackHeapBarrier|)) (<= 0 v_main_~q~0_BEFORE_CALL_18) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_18 1) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_18 v_main_~A~0_BEFORE_CALL_29) (= v_main_~q~0_BEFORE_CALL_18 0) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_18 1) (= |#NULL.base| 0))) (not (= (mod v_main_~A~0_BEFORE_CALL_29 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_18 (* v_main_~q~0_BEFORE_CALL_18 v_main_~b~0_BEFORE_CALL_23)) 4294967296))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:46:41,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:46:41,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:46:41,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-02 22:46:41,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492675324] [2023-04-02 22:46:41,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:46:41,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:46:41,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:46:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:46:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=434, Unknown=1, NotChecked=0, Total=506 [2023-04-02 22:46:41,421 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 22:46:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:46:41,910 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-04-02 22:46:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:46:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 32 [2023-04-02 22:46:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:46:41,912 INFO L225 Difference]: With dead ends: 68 [2023-04-02 22:46:41,912 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 22:46:41,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=107, Invalid=648, Unknown=1, NotChecked=0, Total=756 [2023-04-02 22:46:41,913 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:46:41,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 22:46:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 22:46:41,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-02 22:46:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:46:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-02 22:46:41,933 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2023-04-02 22:46:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:46:41,934 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-02 22:46:41,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 22:46:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-02 22:46:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 22:46:41,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:46:41,935 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:46:41,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 22:46:42,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:42,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:46:42,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:46:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash -586814262, now seen corresponding path program 3 times [2023-04-02 22:46:42,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:46:42,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828868173] [2023-04-02 22:46:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:46:42,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:46:42,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:46:42,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870090863] [2023-04-02 22:46:42,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:46:42,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:42,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:46:42,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:46:42,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 22:46:42,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:46:42,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:46:42,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 22:46:42,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:46:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 22:46:42,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:46:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:46:42,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:46:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828868173] [2023-04-02 22:46:42,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:46:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870090863] [2023-04-02 22:46:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870090863] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:46:42,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433131555] [2023-04-02 22:46:42,369 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:46:42,369 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:46:42,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:46:42,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:46:42,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:46:42,382 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:46:42,517 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:46:42,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:46:42,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:46:42,572 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:46:44,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1692#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~r~0_BEFORE_CALL_25 Int) (v_main_~q~0_BEFORE_CALL_25 Int) (v_main_~b~0_BEFORE_CALL_30 Int) (v_main_~A~0_BEFORE_CALL_40 Int) (v_main_~B~0_BEFORE_CALL_25 Int)) (and (or (and (= v_main_~q~0_BEFORE_CALL_25 0) (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_25 v_main_~A~0_BEFORE_CALL_40) (= v_main_~B~0_BEFORE_CALL_25 1) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 0 v_main_~q~0_BEFORE_CALL_25) (<= 1 |#StackHeapBarrier|) (= v_main_~B~0_BEFORE_CALL_25 1) (<= 1 (+ v_main_~q~0_BEFORE_CALL_25 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (not (= (mod (+ v_main_~r~0_BEFORE_CALL_25 (* v_main_~q~0_BEFORE_CALL_25 v_main_~b~0_BEFORE_CALL_30)) 4294967296) (mod v_main_~A~0_BEFORE_CALL_40 4294967296))))))' at error location [2023-04-02 22:46:44,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:46:44,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:46:44,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-02 22:46:44,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217605526] [2023-04-02 22:46:44,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:46:44,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 22:46:44,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:46:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 22:46:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-04-02 22:46:44,773 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:46:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:46:45,549 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2023-04-02 22:46:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 22:46:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-04-02 22:46:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:46:45,550 INFO L225 Difference]: With dead ends: 78 [2023-04-02 22:46:45,550 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 22:46:45,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:46:45,551 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 22:46:45,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 164 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 22:46:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 22:46:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2023-04-02 22:46:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 22:46:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-04-02 22:46:45,564 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2023-04-02 22:46:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:46:45,564 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-04-02 22:46:45,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 22:46:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-04-02 22:46:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 22:46:45,565 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:46:45,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:46:45,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 22:46:45,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:45,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:46:45,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:46:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1512924149, now seen corresponding path program 4 times [2023-04-02 22:46:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:46:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839684023] [2023-04-02 22:46:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:46:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:46:45,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:46:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140769807] [2023-04-02 22:46:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:46:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:46:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:46:45,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:46:45,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 22:46:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:46:45,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 22:46:45,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:46:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:46:46,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:47:10,097 WARN L223 SmtUtils]: Spent 11.27s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:47:42,668 WARN L223 SmtUtils]: Spent 10.13s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:48:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:48:12,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:48:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839684023] [2023-04-02 22:48:12,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:48:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140769807] [2023-04-02 22:48:12,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140769807] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:48:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266688426] [2023-04-02 22:48:12,059 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:48:12,059 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:48:12,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:48:12,059 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:48:12,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:48:12,072 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:48:12,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:48:12,369 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:48:12,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:48:12,376 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:48:41,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2116#(and (exists ((v_main_~r~0_BEFORE_CALL_37 Int) (v_main_~q~0_BEFORE_CALL_37 Int) (v_main_~A~0_BEFORE_CALL_55 Int) (v_main_~b~0_BEFORE_CALL_42 Int) (v_main_~B~0_BEFORE_CALL_36 Int)) (and (not (= (mod (+ v_main_~r~0_BEFORE_CALL_37 (* v_main_~q~0_BEFORE_CALL_37 v_main_~b~0_BEFORE_CALL_42)) 4294967296) (mod v_main_~A~0_BEFORE_CALL_55 4294967296))) (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~q~0_BEFORE_CALL_37 0) (= v_main_~B~0_BEFORE_CALL_36 1) (= v_main_~r~0_BEFORE_CALL_37 v_main_~A~0_BEFORE_CALL_55) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~q~0_BEFORE_CALL_37) (= v_main_~B~0_BEFORE_CALL_36 1) (= |#NULL.offset| 0) (<= 1 (+ v_main_~q~0_BEFORE_CALL_37 |#StackHeapBarrier|)) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:48:41,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:48:41,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:48:41,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-04-02 22:48:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818214682] [2023-04-02 22:48:41,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:48:41,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 22:48:41,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:48:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 22:48:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=794, Unknown=6, NotChecked=0, Total=930 [2023-04-02 22:48:41,591 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 22:48:44,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-04-02 22:48:47,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:33,815 WARN L223 SmtUtils]: Spent 37.30s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:49:37,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:47,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:51,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:53,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:59,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:03,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:05,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:07,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:09,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:11,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:50:13,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []