/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_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:44:33,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:44:33,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:44:33,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:44:33,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:44:33,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:44:33,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:44:33,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:44:33,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:44:33,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:44:33,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:44:33,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:44:33,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:44:33,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:44:33,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:44:33,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:44:33,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:44:33,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:44:33,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:44:33,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:44:33,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:44:33,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:44:33,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:44:33,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:44:33,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:44:33,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:44:33,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:44:33,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:44:33,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:44:33,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:44:33,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:44:33,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:44:33,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:44:33,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:44:33,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:44:33,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:44:33,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:44:33,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:44:33,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:44:33,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:44:33,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:44:33,215 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 22:44:33,234 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:44:33,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:44:33,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:44:33,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:44:33,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:44:33,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:44:33,235 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:44:33,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:44:33,236 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:44:33,236 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:44:33,236 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:44:33,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:44:33,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:44:33,237 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:44:33,237 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:44:33,237 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:44:33,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:44:33,238 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:44:33,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:44:33,238 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:44:33,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:44:33,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:44:33,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:44:33,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:44:33,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:44:33,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:44:33,240 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:44:33,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:44:33,240 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:44:33,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:44:33,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:44:33,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:44:33,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:44:33,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:44:33,242 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:44:33,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:44:33,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:44:33,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:44:33,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:44:33,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:44:33,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:44:33,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:44:33,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:44:33,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:44:33,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:44:33,519 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:44:33,520 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:44:33,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2023-04-02 22:44:34,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:44:34,816 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:44:34,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2023-04-02 22:44:34,821 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407a13835/395a30043b694bff9da4cc8baf37fcfd/FLAG23112db8d [2023-04-02 22:44:34,831 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/407a13835/395a30043b694bff9da4cc8baf37fcfd [2023-04-02 22:44:34,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:44:34,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:44:34,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:44:34,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:44:34,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:44:34,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:44:34" (1/1) ... [2023-04-02 22:44:34,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7262e7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:34, skipping insertion in model container [2023-04-02 22:44:34,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:44:34" (1/1) ... [2023-04-02 22:44:34,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:44:34,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:44:34,981 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_valuebound20.i[951,964] [2023-04-02 22:44:34,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:44:35,006 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:44:35,020 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_valuebound20.i[951,964] [2023-04-02 22:44:35,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:44:35,045 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:44:35,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35 WrapperNode [2023-04-02 22:44:35,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:44:35,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:44:35,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:44:35,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:44:35,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,069 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:44:35,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:44:35,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:44:35,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:44:35,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (1/1) ... [2023-04-02 22:44:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:44:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:35,104 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 22:44:35,112 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 22:44:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:44:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:44:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:44:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:44:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:44:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:44:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:44:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:44:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:44:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:44:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:44:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:44:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:44:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:44:35,199 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:44:35,200 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:44:35,309 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:44:35,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:44:35,376 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:44:35,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:44:35 BoogieIcfgContainer [2023-04-02 22:44:35,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:44:35,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:44:35,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:44:35,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:44:35,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:44:34" (1/3) ... [2023-04-02 22:44:35,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1fb66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:44:35, skipping insertion in model container [2023-04-02 22:44:35,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:35" (2/3) ... [2023-04-02 22:44:35,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1fb66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:44:35, skipping insertion in model container [2023-04-02 22:44:35,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:44:35" (3/3) ... [2023-04-02 22:44:35,400 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2023-04-02 22:44:35,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:44:35,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:44:35,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:44:35,470 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;@55529a62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:44:35,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:44:35,473 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 22:44:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:44:35,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:35,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:44:35,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:35,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2063405903, now seen corresponding path program 1 times [2023-04-02 22:44:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476412839] [2023-04-02 22:44:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:35,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:35,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476412839] [2023-04-02 22:44:35,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:44:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443417188] [2023-04-02 22:44:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:35,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:35,617 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 22:44:35,656 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 22:44:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:35,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:44:35,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:35,738 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 22:44:35,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443417188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:35,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:44:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637794700] [2023-04-02 22:44:35,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:35,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:44:35,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:44:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:44:35,767 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 22:44:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:35,810 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 22:44:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:44:35,813 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 22:44:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:35,819 INFO L225 Difference]: With dead ends: 39 [2023-04-02 22:44:35,819 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:44:35,823 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 22:44:35,829 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 22:44:35,831 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 22:44:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:44:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 22:44:35,864 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 22:44:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 22:44:35,867 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-04-02 22:44:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:35,867 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 22:44:35,868 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 22:44:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 22:44:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:44:35,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:35,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:44:35,877 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 22:44:36,074 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 22:44:36,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:36,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 775763039, now seen corresponding path program 1 times [2023-04-02 22:44:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624729367] [2023-04-02 22:44:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:36,096 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:36,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805772753] [2023-04-02 22:44:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:36,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:36,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:36,102 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 22:44:36,105 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 22:44:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:36,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 22:44:36,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:36,360 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 22:44:36,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:36,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:36,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624729367] [2023-04-02 22:44:36,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805772753] [2023-04-02 22:44:36,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805772753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:36,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:36,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 22:44:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991413970] [2023-04-02 22:44:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:44:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:44:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:44:36,364 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 22:44:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:36,466 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-02 22:44:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:44:36,467 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 22:44:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:36,467 INFO L225 Difference]: With dead ends: 33 [2023-04-02 22:44:36,467 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:44:36,468 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 22:44:36,469 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 22:44:36,470 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 22:44:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:44:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:44:36,480 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 22:44:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 22:44:36,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2023-04-02 22:44:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:36,482 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 22:44:36,483 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 22:44:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 22:44:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:44:36,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:36,483 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 22:44:36,489 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 22:44:36,685 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 22:44:36,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:36,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1098892102, now seen corresponding path program 1 times [2023-04-02 22:44:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141520240] [2023-04-02 22:44:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:36,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:36,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449368557] [2023-04-02 22:44:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:36,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:36,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:36,700 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 22:44:36,706 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 22:44:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:36,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:44:36,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:44:36,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:36,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:36,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141520240] [2023-04-02 22:44:36,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:36,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449368557] [2023-04-02 22:44:36,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449368557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:36,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:36,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 22:44:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100415083] [2023-04-02 22:44:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:44:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:36,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:44:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:44:36,893 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 22:44:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:36,973 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-02 22:44:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:44:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 18 [2023-04-02 22:44:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:36,975 INFO L225 Difference]: With dead ends: 40 [2023-04-02 22:44:36,976 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 22:44:36,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:44:36,979 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:44:36,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:44:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 22:44:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-04-02 22:44:36,995 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 22:44:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 22:44:36,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2023-04-02 22:44:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:36,996 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 22:44:36,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 22:44:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 22:44:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 22:44:36,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:36,997 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 22:44:37,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:44:37,202 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 22:44:37,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:37,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash 495415094, now seen corresponding path program 1 times [2023-04-02 22:44:37,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:37,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865204246] [2023-04-02 22:44:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:37,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318265924] [2023-04-02 22:44:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:37,225 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 22:44:37,226 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 22:44:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:37,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:44:37,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:37,301 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 22:44:37,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:37,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865204246] [2023-04-02 22:44:37,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318265924] [2023-04-02 22:44:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318265924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:37,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:37,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:44:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773804398] [2023-04-02 22:44:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:37,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:44:37,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:44:37,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:44:37,304 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 22:44:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:37,328 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-02 22:44:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:44:37,331 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 22:44:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:37,333 INFO L225 Difference]: With dead ends: 43 [2023-04-02 22:44:37,334 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:44:37,334 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 22:44:37,338 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 22:44:37,340 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 22:44:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:44:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:44:37,345 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 22:44:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 22:44:37,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2023-04-02 22:44:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:37,346 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 22:44:37,346 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 22:44:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 22:44:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:44:37,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:37,347 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 22:44:37,355 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 22:44:37,552 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 22:44:37,552 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:37,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1112955515, now seen corresponding path program 1 times [2023-04-02 22:44:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757381360] [2023-04-02 22:44:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:37,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169975478] [2023-04-02 22:44:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:37,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:37,588 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 22:44:37,603 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 22:44:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:37,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 22:44:37,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:37,891 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 22:44:37,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:44:38,952 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 22:44:38,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:38,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757381360] [2023-04-02 22:44:38,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:38,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169975478] [2023-04-02 22:44:38,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169975478] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:44:38,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778238916] [2023-04-02 22:44:38,970 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:44:38,970 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:44:38,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:44:38,977 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:44:38,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:44:39,030 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:44:39,306 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:44:39,390 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:44:39,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:44:39,401 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:44:41,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (exists ((v_main_~b~0_BEFORE_CALL_11 Int) (v_main_~B~0_BEFORE_CALL_6 Int) (v_main_~A~0_BEFORE_CALL_13 Int) (v_main_~r~0_BEFORE_CALL_10 Int) (v_main_~q~0_BEFORE_CALL_10 Int)) (and (not (= (mod (+ v_main_~r~0_BEFORE_CALL_10 (* v_main_~q~0_BEFORE_CALL_10 v_main_~b~0_BEFORE_CALL_11)) 4294967296) (mod v_main_~A~0_BEFORE_CALL_13 4294967296))) (or (and (= v_main_~q~0_BEFORE_CALL_10 0) (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_10 v_main_~A~0_BEFORE_CALL_13) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_6 1) (= |#NULL.base| 0)) (and (<= 1 (+ v_main_~q~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~q~0_BEFORE_CALL_10) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_6 1) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:44:41,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:44:41,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:44:41,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-02 22:44:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473974207] [2023-04-02 22:44:41,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:44:41,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:44:41,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:44:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:44:41,495 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 22:44:49,254 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 22:44:51,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:44:53,263 WARN L539 Checker$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 22:45:13,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:45:16,281 WARN L539 Checker$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 22:45:17,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:45:19,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:45:22,688 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 22:45:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:22,729 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-04-02 22:45:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 22:45:22,730 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 22:45:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:22,732 INFO L225 Difference]: With dead ends: 67 [2023-04-02 22:45:22,732 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 22:45:22,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:45:22,733 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 28 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:22,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 103 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 171 Invalid, 7 Unknown, 0 Unchecked, 20.2s Time] [2023-04-02 22:45:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 22:45:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-04-02 22:45:22,750 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 22:45:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-02 22:45:22,754 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2023-04-02 22:45:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:22,754 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-02 22:45:22,754 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 22:45:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-02 22:45:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 22:45:22,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:22,756 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 22:45:22,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:45:22,961 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 22:45:22,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:22,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1265077862, now seen corresponding path program 2 times [2023-04-02 22:45:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969067032] [2023-04-02 22:45:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:22,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400287077] [2023-04-02 22:45:22,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:45:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:22,982 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 22:45:22,984 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 22:45:23,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:45:23,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:45:23,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 22:45:23,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:23,240 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 22:45:23,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:23,404 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 22:45:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969067032] [2023-04-02 22:45:23,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400287077] [2023-04-02 22:45:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400287077] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612248258] [2023-04-02 22:45:23,417 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:45:23,417 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:23,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:23,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:23,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:23,433 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:23,604 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:45:23,790 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:23,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:23,797 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:26,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1214#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0_BEFORE_CALL_22 Int) (v_main_~r~0_BEFORE_CALL_18 Int) (v_main_~q~0_BEFORE_CALL_17 Int) (v_main_~B~0_BEFORE_CALL_17 Int) (v_main_~A~0_BEFORE_CALL_24 Int)) (and (not (= (mod (+ v_main_~r~0_BEFORE_CALL_18 (* v_main_~q~0_BEFORE_CALL_17 v_main_~b~0_BEFORE_CALL_22)) 4294967296) (mod v_main_~A~0_BEFORE_CALL_24 4294967296))) (or (and (= v_main_~B~0_BEFORE_CALL_17 1) (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~q~0_BEFORE_CALL_17 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 0 v_main_~q~0_BEFORE_CALL_17) (= |#NULL.base| 0)) (and (= v_main_~B~0_BEFORE_CALL_17 1) (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_18 v_main_~A~0_BEFORE_CALL_24) (= v_main_~q~0_BEFORE_CALL_17 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))))))' at error location [2023-04-02 22:45:26,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:45:26,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:26,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-02 22:45:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26662997] [2023-04-02 22:45:26,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:45:26,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:45:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:45:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:45:26,340 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 22:45:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:26,818 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-04-02 22:45:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:45:26,819 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 22:45:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:26,820 INFO L225 Difference]: With dead ends: 68 [2023-04-02 22:45:26,820 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 22:45:26,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:45:26,821 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:26,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 104 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 22:45:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 22:45:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-02 22:45:26,839 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 22:45:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-02 22:45:26,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2023-04-02 22:45:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:26,840 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-02 22:45:26,842 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 22:45:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-02 22:45:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 22:45:26,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:26,843 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 22:45:26,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:45:27,048 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 22:45:27,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:27,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -586814262, now seen corresponding path program 3 times [2023-04-02 22:45:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403147494] [2023-04-02 22:45:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:27,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:27,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853609226] [2023-04-02 22:45:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:45:27,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:27,066 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 22:45:27,069 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 22:45:27,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:45:27,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:45:27,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 22:45:27,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:27,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:45:34,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403147494] [2023-04-02 22:45:34,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853609226] [2023-04-02 22:45:34,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853609226] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551847612] [2023-04-02 22:45:34,063 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:45:34,063 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:34,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:34,063 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:34,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:34,078 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:34,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:45:34,294 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:34,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:34,299 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:38,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1619#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~q~0_BEFORE_CALL_27 Int) (v_main_~r~0_BEFORE_CALL_28 Int) (v_main_~b~0_BEFORE_CALL_32 Int) (v_main_~B~0_BEFORE_CALL_24 Int) (v_main_~A~0_BEFORE_CALL_38 Int)) (and (not (= (mod v_main_~A~0_BEFORE_CALL_38 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_28 (* v_main_~q~0_BEFORE_CALL_27 v_main_~b~0_BEFORE_CALL_32)) 4294967296))) (or (and (= v_main_~r~0_BEFORE_CALL_28 v_main_~A~0_BEFORE_CALL_38) (<= 1 |#StackHeapBarrier|) (= v_main_~q~0_BEFORE_CALL_27 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= v_main_~B~0_BEFORE_CALL_24 1)) (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~q~0_BEFORE_CALL_27 |#StackHeapBarrier|)) (<= 0 v_main_~q~0_BEFORE_CALL_27) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= v_main_~B~0_BEFORE_CALL_24 1))))))' at error location [2023-04-02 22:45:38,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:45:38,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-02 22:45:38,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089953102] [2023-04-02 22:45:38,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:45:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 22:45:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 22:45:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 22:45:38,716 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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 22:46:49,932 WARN L223 SmtUtils]: Spent 54.79s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:46:52,416 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 22:46:54,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:56,430 WARN L539 Checker$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 22:47:10,390 WARN L223 SmtUtils]: Spent 9.63s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:47:17,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:20,848 WARN L539 Checker$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 22:47:41,530 WARN L223 SmtUtils]: Spent 19.17s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:48:10,502 WARN L223 SmtUtils]: Spent 11.76s 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 22:48:25,092 WARN L223 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:48:41,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:48:50,610 WARN L539 Checker$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 22:48:53,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:48:56,632 WARN L539 Checker$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 22:48:58,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:00,888 WARN L539 Checker$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 22:49:03,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:05,761 WARN L539 Checker$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 22:49:09,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:11,254 WARN L539 Checker$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 22:49:13,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:14,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:49:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:49:15,503 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2023-04-02 22:49:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 22:49:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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 31 [2023-04-02 22:49:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:49:15,507 INFO L225 Difference]: With dead ends: 105 [2023-04-02 22:49:15,507 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 22:49:15,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 177.4s TimeCoverageRelationStatistics Valid=356, Invalid=1702, Unknown=12, NotChecked=0, Total=2070 [2023-04-02 22:49:15,509 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 46 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:49:15,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 190 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 362 Invalid, 12 Unknown, 0 Unchecked, 48.4s Time] [2023-04-02 22:49:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 22:49:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-04-02 22:49:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 68 states have internal predecessors, (73), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 22:49:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2023-04-02 22:49:15,542 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 31 [2023-04-02 22:49:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:49:15,542 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2023-04-02 22:49:15,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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 22:49:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2023-04-02 22:49:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 22:49:15,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:49:15,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:49:15,552 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 22:49:15,750 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 22:49:15,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:49:15,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:49:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -658199840, now seen corresponding path program 4 times [2023-04-02 22:49:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:49:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80086783] [2023-04-02 22:49:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:49:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:49:15,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:49:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591040409] [2023-04-02 22:49:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:49:15,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:49:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:49:15,772 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 22:49:15,775 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 22:49:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:49:15,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 22:49:15,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:49:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 22:49:16,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:49:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 22:49:16,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:49:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80086783] [2023-04-02 22:49:16,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:49:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591040409] [2023-04-02 22:49:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591040409] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:49:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1416285632] [2023-04-02 22:49:16,625 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:49:16,625 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:49:16,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:49:16,625 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:49:16,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:49:16,638 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs