/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_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:44:12,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:44:12,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:44:12,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:44:12,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:44:12,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:44:12,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:44:12,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:44:12,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:44:12,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:44:12,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:44:12,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:44:12,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:44:12,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:44:12,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:44:12,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:44:12,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:44:12,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:44:12,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:44:12,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:44:12,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:44:12,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:44:12,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:44:12,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:44:12,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:44:12,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:44:12,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:44:12,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:44:12,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:44:12,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:44:12,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:44:12,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:44:12,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:44:12,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:44:12,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:44:12,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:44:12,825 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 22:44:12,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:44:12,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:44:12,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:44:12,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:44:12,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:44:12,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:44:12,852 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:44:12,853 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:44:12,853 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:44:12,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:44:12,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:44:12,854 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:44:12,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:44:12,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:44:12,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:44:12,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:44:12,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:44:12,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:44:12,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:44:13,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:44:13,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:44:13,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:44:13,047 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:44:13,047 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:44:13,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2023-04-02 22:44:13,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:44:14,123 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:44:14,124 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2023-04-02 22:44:14,127 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0194ab83d/6414d5b2f6434f1b8d6726b336a396ff/FLAG6797795b1 [2023-04-02 22:44:14,136 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0194ab83d/6414d5b2f6434f1b8d6726b336a396ff [2023-04-02 22:44:14,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:44:14,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:44:14,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:44:14,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:44:14,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:44:14,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293a128b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14, skipping insertion in model container [2023-04-02 22:44:14,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:44:14,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:44:14,292 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_valuebound100.i[951,964] [2023-04-02 22:44:14,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:44:14,311 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:44:14,321 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_valuebound100.i[951,964] [2023-04-02 22:44:14,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:44:14,339 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:44:14,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14 WrapperNode [2023-04-02 22:44:14,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:44:14,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:44:14,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:44:14,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:44:14,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,368 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:44:14,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:44:14,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:44:14,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:44:14,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (1/1) ... [2023-04-02 22:44:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:44:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:14,394 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 22:44:14,412 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 22:44:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:44:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:44:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:44:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:44:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:44:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:44:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:44:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:44:14,489 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:44:14,491 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:44:14,632 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:44:14,674 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:44:14,674 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:44:14,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:44:14 BoogieIcfgContainer [2023-04-02 22:44:14,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:44:14,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:44:14,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:44:14,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:44:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:44:14" (1/3) ... [2023-04-02 22:44:14,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217aa6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:44:14, skipping insertion in model container [2023-04-02 22:44:14,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:44:14" (2/3) ... [2023-04-02 22:44:14,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217aa6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:44:14, skipping insertion in model container [2023-04-02 22:44:14,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:44:14" (3/3) ... [2023-04-02 22:44:14,681 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.i [2023-04-02 22:44:14,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:44:14,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:44:14,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:44:14,726 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;@607ea603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:44:14,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:44:14,729 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 22:44:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:44:14,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:14,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:44:14,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:14,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2063405903, now seen corresponding path program 1 times [2023-04-02 22:44:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:14,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072556017] [2023-04-02 22:44:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:14,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072556017] [2023-04-02 22:44:14,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:44:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364396718] [2023-04-02 22:44:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:14,838 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 22:44:14,869 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 22:44:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:14,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:44:14,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:14,930 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 22:44:14,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364396718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:14,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:44:14,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952597579] [2023-04-02 22:44:14,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:14,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:44:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:44:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:44:14,953 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 22:44:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:14,976 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 22:44:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:44:14,978 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 22:44:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:14,983 INFO L225 Difference]: With dead ends: 39 [2023-04-02 22:44:14,983 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:44:14,985 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 22:44:14,988 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 22:44:14,989 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 22:44:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:44:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 22:44:15,009 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 22:44:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-02 22:44:15,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2023-04-02 22:44:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:15,011 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-02 22:44:15,011 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 22:44:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-02 22:44:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:44:15,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:15,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:44:15,018 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 22:44:15,216 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 22:44:15,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:15,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 775763039, now seen corresponding path program 1 times [2023-04-02 22:44:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:15,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114879560] [2023-04-02 22:44:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:15,229 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856867321] [2023-04-02 22:44:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:15,230 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 22:44:15,251 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 22:44:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:15,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 22:44:15,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:15,419 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 22:44:15,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:15,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114879560] [2023-04-02 22:44:15,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856867321] [2023-04-02 22:44:15,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856867321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:15,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 22:44:15,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401315326] [2023-04-02 22:44:15,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:44:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:44:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:44:15,422 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 22:44:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:15,484 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-02 22:44:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:44:15,484 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 22:44:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:15,485 INFO L225 Difference]: With dead ends: 33 [2023-04-02 22:44:15,485 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:44:15,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-02 22:44:15,486 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:44:15,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:44:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:44:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:44:15,492 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 22:44:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 22:44:15,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2023-04-02 22:44:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:15,493 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 22:44:15,493 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 22:44:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 22:44:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:44:15,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:15,493 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 22:44:15,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 22:44:15,698 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 22:44:15,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:15,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1098892102, now seen corresponding path program 1 times [2023-04-02 22:44:15,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:15,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117820754] [2023-04-02 22:44:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:15,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174869048] [2023-04-02 22:44:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:15,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:15,714 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 22:44:15,716 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 22:44:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:15,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:44:15,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:15,881 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 22:44:15,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:15,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117820754] [2023-04-02 22:44:15,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:15,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174869048] [2023-04-02 22:44:15,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174869048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:15,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:15,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 22:44:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234070502] [2023-04-02 22:44:15,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:44:15,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:15,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:44:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:44:15,886 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 22:44:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:15,956 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-04-02 22:44:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:44:15,957 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 22:44:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:15,957 INFO L225 Difference]: With dead ends: 40 [2023-04-02 22:44:15,957 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 22:44:15,958 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 22:44:15,959 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:44:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:44:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 22:44:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-04-02 22:44:15,963 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 22:44:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 22:44:15,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2023-04-02 22:44:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:15,965 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 22:44:15,965 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 22:44:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 22:44:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 22:44:15,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:15,966 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 22:44:15,975 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 22:44:16,166 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 22:44:16,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:16,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash 495415094, now seen corresponding path program 1 times [2023-04-02 22:44:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783085609] [2023-04-02 22:44:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:16,177 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:16,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861641642] [2023-04-02 22:44:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:16,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:16,178 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 22:44:16,197 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 22:44:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:16,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:44:16,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:16,260 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 22:44:16,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:44:16,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783085609] [2023-04-02 22:44:16,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861641642] [2023-04-02 22:44:16,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861641642] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:44:16,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:44:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:44:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408836882] [2023-04-02 22:44:16,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:44:16,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:44:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:44:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:44:16,264 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 22:44:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:44:16,290 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-02 22:44:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:44:16,294 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 22:44:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:44:16,295 INFO L225 Difference]: With dead ends: 43 [2023-04-02 22:44:16,295 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:44:16,295 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 22:44:16,296 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 22:44:16,296 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 22:44:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:44:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:44:16,302 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 22:44:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-02 22:44:16,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2023-04-02 22:44:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:44:16,303 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-02 22:44:16,303 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 22:44:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-02 22:44:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:44:16,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:44:16,304 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 22:44:16,311 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 22:44:16,511 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 22:44:16,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:44:16,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:44:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1112955515, now seen corresponding path program 1 times [2023-04-02 22:44:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:44:16,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315271510] [2023-04-02 22:44:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:16,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:44:16,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:44:16,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487706210] [2023-04-02 22:44:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:44:16,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:44:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:44:16,523 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 22:44:16,525 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 22:44:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:44:16,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 22:44:16,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:44:16,745 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 22:44:16,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:44:22,705 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 22:44:22,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:44:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315271510] [2023-04-02 22:44:22,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:44:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487706210] [2023-04-02 22:44:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487706210] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:44:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941558338] [2023-04-02 22:44:22,722 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:44:22,722 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:44:22,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:44:22,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:44:22,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:44:22,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:44:22,985 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:44:23,023 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:44:23,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:44:23,036 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:44:25,897 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 22:44:25,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:44:25,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:44:25,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-02 22:44:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271465916] [2023-04-02 22:44:25,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:44:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:44:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:44:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:44:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=603, Unknown=1, NotChecked=0, Total=702 [2023-04-02 22:44:25,899 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 22:44:34,696 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 22:44:36,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:44:38,708 WARN L539 Checker$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 22:44:52,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:44:54,438 WARN L539 Checker$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 22:44:59,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:45:01,223 WARN L539 Checker$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 22:45:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:01,338 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-04-02 22:45:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 22:45:01,339 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 22:45:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:01,340 INFO L225 Difference]: With dead ends: 67 [2023-04-02 22:45:01,340 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 22:45:01,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=165, Invalid=956, Unknown=1, NotChecked=0, Total=1122 [2023-04-02 22:45:01,342 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:01,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 103 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 6 Unknown, 0 Unchecked, 19.0s Time] [2023-04-02 22:45:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 22:45:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-04-02 22:45:01,357 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 22:45:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-02 22:45:01,358 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2023-04-02 22:45:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:01,358 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-02 22:45:01,359 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 22:45:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-02 22:45:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 22:45:01,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:01,364 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 22:45:01,369 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 22:45:01,564 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 22:45:01,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:01,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1265077862, now seen corresponding path program 2 times [2023-04-02 22:45:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:01,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613453191] [2023-04-02 22:45:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:01,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:01,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122804796] [2023-04-02 22:45:01,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:45:01,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:01,574 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 22:45:01,575 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 22:45:01,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:45:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:45:01,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 22:45:01,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:01,794 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 22:45:01,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:01,919 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 22:45:01,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613453191] [2023-04-02 22:45:01,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122804796] [2023-04-02 22:45:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122804796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:01,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327880527] [2023-04-02 22:45:01,921 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:45:01,921 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:01,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:01,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:01,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:01,932 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:02,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:45:02,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:02,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:02,194 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:04,513 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 22:45:04,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:45:04,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-02 22:45:04,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346427227] [2023-04-02 22:45:04,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:45:04,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:45:04,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:45:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:45:04,515 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 22:45:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:45:04,859 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-04-02 22:45:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:45:04,859 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 22:45:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:45:04,861 INFO L225 Difference]: With dead ends: 68 [2023-04-02 22:45:04,861 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 22:45:04,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:45:04,862 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:45:04,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 104 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:45:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 22:45:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-02 22:45:04,874 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 22:45:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-02 22:45:04,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2023-04-02 22:45:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:45:04,874 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-02 22:45:04,875 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 22:45:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-02 22:45:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 22:45:04,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:45:04,875 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 22:45:04,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 22:45:05,076 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 22:45:05,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:45:05,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:45:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -586814262, now seen corresponding path program 3 times [2023-04-02 22:45:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:45:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277093955] [2023-04-02 22:45:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:45:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:45:05,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:45:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573763491] [2023-04-02 22:45:05,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:45:05,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:45:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:45:05,094 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 22:45:05,096 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 22:45:05,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:45:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:45:05,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 22:45:05,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:45:05,362 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 22:45:05,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:45:14,998 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 22:45:14,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:45:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277093955] [2023-04-02 22:45:14,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:45:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573763491] [2023-04-02 22:45:14,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573763491] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:45:14,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026467355] [2023-04-02 22:45:15,000 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:45:15,000 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:45:15,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:45:15,001 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:45:15,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:45:15,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:45:15,093 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:45:15,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:45:15,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:45:15,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:45:20,655 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 22:45:20,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:45:20,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:45:20,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-04-02 22:45:20,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070679724] [2023-04-02 22:45:20,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:45:20,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 22:45:20,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:45:20,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 22:45:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=904, Unknown=1, NotChecked=0, Total=1056 [2023-04-02 22:45:20,657 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 22:45:24,374 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_main_~b~0 1073741824)) (.cse9 (mod c_main_~b~0 536870912)) (.cse3 (mod c_main_~b~0 2147483648))) (let ((.cse4 (mod c_main_~b~0 4294967296)) (.cse0 (* 2 .cse3)) (.cse8 (* .cse9 8)) (.cse2 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~r~0 4294967296)) (.cse6 (* .cse5 4))) (and (or (<= .cse0 .cse1) (= .cse2 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse3)) 4294967296)) (< .cse1 .cse4)) (= .cse2 (mod (+ c_main_~r~0 (* c_main_~b~0 c_main_~q~0)) 4294967296)) (<= .cse2 100) (= .cse2 (mod (+ (* (div .cse4 2) c_main_~q~0 2) c_main_~r~0) 4294967296)) (or (< .cse1 .cse0) (= .cse2 (mod (+ (* .cse5 c_main_~q~0 4) c_main_~r~0) 4294967296)) (<= .cse6 .cse1)) (let ((.cse7 (mod c_main_~b~0 268435456))) (or (= .cse2 (mod (+ (* c_main_~q~0 16 .cse7) c_main_~r~0) 4294967296)) (<= (* 16 .cse7) .cse1) (< .cse1 .cse8))) (or (<= .cse8 .cse1) (= (mod (+ c_main_~r~0 (* .cse9 c_main_~q~0 8)) 4294967296) .cse2) (< .cse1 .cse6))))) is different from false [2023-04-02 22:45:34,766 WARN L223 SmtUtils]: Spent 8.99s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:46:11,486 WARN L223 SmtUtils]: Spent 34.28s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:46:13,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:15,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:17,051 WARN L539 Checker$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 22:46:31,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:52,762 WARN L223 SmtUtils]: Spent 20.28s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:46:54,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:56,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:46:58,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:15,122 WARN L223 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:47:17,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:19,128 WARN L539 Checker$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 22:47:31,121 WARN L223 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:47:34,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:44,060 WARN L539 Checker$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 22:47:46,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:48,301 WARN L539 Checker$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 22:47:50,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:52,762 WARN L539 Checker$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 22:47:56,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:47:58,524 WARN L539 Checker$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 22:48:04,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:48:06,650 WARN L539 Checker$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 22:48:08,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:48:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:48:08,999 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2023-04-02 22:48:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-02 22:48:09,000 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 22:48:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:48:09,000 INFO L225 Difference]: With dead ends: 110 [2023-04-02 22:48:09,001 INFO L226 Difference]: Without dead ends: 104 [2023-04-02 22:48:09,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 128.9s TimeCoverageRelationStatistics Valid=333, Invalid=1643, Unknown=8, NotChecked=86, Total=2070 [2023-04-02 22:48:09,002 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 44 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 53.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:48:09,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 193 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 383 Invalid, 14 Unknown, 35 Unchecked, 53.2s Time] [2023-04-02 22:48:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-02 22:48:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2023-04-02 22:48:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 22:48:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-04-02 22:48:09,028 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 31 [2023-04-02 22:48:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:48:09,028 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-04-02 22:48:09,028 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 22:48:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-04-02 22:48:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 22:48:09,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:48:09,029 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 22:48:09,038 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 22:48:09,234 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 22:48:09,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:48:09,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:48:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -658199840, now seen corresponding path program 4 times [2023-04-02 22:48:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:48:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781228041] [2023-04-02 22:48:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:48:09,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:48:09,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:48:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765226091] [2023-04-02 22:48:09,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:48:09,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:48:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:48:09,243 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 22:48:09,244 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 22:48:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:48:09,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 22:48:09,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:48:09,512 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 22:48:09,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:48:10,542 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 22:48:10,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:48:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781228041] [2023-04-02 22:48:10,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:48:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765226091] [2023-04-02 22:48:10,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765226091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:48:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904576697] [2023-04-02 22:48:10,544 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:48:10,544 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:48:10,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:48:10,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:48:10,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:48:10,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:48:10,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:48:10,686 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 22:48:10,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:48:10,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:48:13,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2214#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0_BEFORE_CALL_45 Int) (v_main_~B~0_BEFORE_CALL_37 Int) (v_main_~q~0_BEFORE_CALL_34 Int) (v_main_~A~0_BEFORE_CALL_49 Int) (v_main_~r~0_BEFORE_CALL_35 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~q~0_BEFORE_CALL_34 0) (= v_main_~r~0_BEFORE_CALL_35 v_main_~A~0_BEFORE_CALL_49) (= v_main_~B~0_BEFORE_CALL_37 1) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~q~0_BEFORE_CALL_34) (= v_main_~B~0_BEFORE_CALL_37 1) (= |#NULL.offset| 0) (<= 1 (+ v_main_~q~0_BEFORE_CALL_34 |#StackHeapBarrier|)) (= |#NULL.base| 0))) (not (= (mod v_main_~A~0_BEFORE_CALL_49 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_35 (* v_main_~q~0_BEFORE_CALL_34 v_main_~b~0_BEFORE_CALL_45)) 4294967296))))))' at error location [2023-04-02 22:48:13,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:48:13,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:48:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-02 22:48:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97264688] [2023-04-02 22:48:13,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:48:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:48:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:48:13,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:48:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:48:13,642 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 22:48:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:48:14,967 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2023-04-02 22:48:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:48:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 41 [2023-04-02 22:48:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:48:14,968 INFO L225 Difference]: With dead ends: 103 [2023-04-02 22:48:14,968 INFO L226 Difference]: Without dead ends: 80 [2023-04-02 22:48:14,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 22:48:14,970 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 22:48:14,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 160 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 22:48:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-02 22:48:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2023-04-02 22:48:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 61 states have internal predecessors, (67), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 22:48:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-04-02 22:48:14,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 41 [2023-04-02 22:48:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:48:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-04-02 22:48:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 22:48:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-04-02 22:48:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 22:48:14,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:48:14,989 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:48:14,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 22:48:15,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 22:48:15,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:48:15,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:48:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1718879610, now seen corresponding path program 5 times [2023-04-02 22:48:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:48:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472272602] [2023-04-02 22:48:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:48:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:48:15,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:48:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033943395] [2023-04-02 22:48:15,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:48:15,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:48:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:48:15,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:48:15,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 22:48:35,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:48:35,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:48:35,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 22:48:35,696 INFO L285 TraceCheckSpWp]: Computing forward predicates...