/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/ps5-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:29:26,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:29:26,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:29:26,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:29:26,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:29:26,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:29:26,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:29:26,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:29:26,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:29:26,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:29:26,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:29:26,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:29:26,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:29:26,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:29:26,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:29:26,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:29:26,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:29:26,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:29:26,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:29:26,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:29:26,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:29:26,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:29:26,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:29:26,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:29:26,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:29:26,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:29:26,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:29:26,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:29:26,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:29:26,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:29:26,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:29:26,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:29:26,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:29:26,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:29:26,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:29:26,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:29:26,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:29:26,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:29:26,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:29:26,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:29:26,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:29:26,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:29:26,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:29:26,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:29:26,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:29:26,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:29:26,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:29:26,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:29:26,896 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:29:26,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:29:26,896 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:29:26,897 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:29:26,897 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:29:26,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:29:26,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:29:26,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:29:26,898 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:29:26,898 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:29:26,898 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:29:26,898 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:29:26,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:29:26,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:29:26,900 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:29:26,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:29:26,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:29:26,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:29:26,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:29:26,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:29:26,900 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:29:26,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:29:27,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:29:27,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:29:27,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:29:27,136 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:29:27,137 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:29:27,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-04-01 05:29:28,224 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:29:28,440 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:29:28,440 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-04-01 05:29:28,446 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de8ad395a/b21b795a6e8248d490bec26788cf72f1/FLAG650a8dccf [2023-04-01 05:29:28,460 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de8ad395a/b21b795a6e8248d490bec26788cf72f1 [2023-04-01 05:29:28,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:29:28,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:29:28,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:29:28,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:29:28,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:29:28,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a3e060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28, skipping insertion in model container [2023-04-01 05:29:28,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:29:28,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:29:28,607 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/ps5-ll_unwindbound100.c[458,471] [2023-04-01 05:29:28,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:29:28,632 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:29:28,639 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/ps5-ll_unwindbound100.c[458,471] [2023-04-01 05:29:28,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:29:28,659 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:29:28,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28 WrapperNode [2023-04-01 05:29:28,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:29:28,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:29:28,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:29:28,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:29:28,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:29:28,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:29:28,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:29:28,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:29:28,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (1/1) ... [2023-04-01 05:29:28,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:29:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:28,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:29:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:29:28,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:29:28,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:29:28,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:29:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:29:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:29:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:29:28,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:29:28,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:29:28,833 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:29:28,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:29:29,007 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:29:29,041 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:29:29,041 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:29:29,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:29:29 BoogieIcfgContainer [2023-04-01 05:29:29,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:29:29,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:29:29,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:29:29,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:29:29,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:29:28" (1/3) ... [2023-04-01 05:29:29,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197d5df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:29:29, skipping insertion in model container [2023-04-01 05:29:29,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:29:28" (2/3) ... [2023-04-01 05:29:29,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197d5df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:29:29, skipping insertion in model container [2023-04-01 05:29:29,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:29:29" (3/3) ... [2023-04-01 05:29:29,050 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound100.c [2023-04-01 05:29:29,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:29:29,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:29:29,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:29:29,104 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;@4ddb7232, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:29:29,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:29:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:29:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:29:29,113 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:29,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:29,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:29,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1588681703, now seen corresponding path program 1 times [2023-04-01 05:29:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442772966] [2023-04-01 05:29:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:29,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:29,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:29:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442772966] [2023-04-01 05:29:29,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:29:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098096041] [2023-04-01 05:29:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:29,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:29,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:29,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:29:29,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:29:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:29,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:29:29,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:29,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:29:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098096041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:29:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:29:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:29:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377364631] [2023-04-01 05:29:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:29:29,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:29:29,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:29:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:29:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:29:29,418 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-04-01 05:29:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:29:29,452 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-01 05:29:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:29:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 14 [2023-04-01 05:29:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:29:29,463 INFO L225 Difference]: With dead ends: 41 [2023-04-01 05:29:29,464 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 05:29:29,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:29:29,473 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:29:29,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:29:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 05:29:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 05:29:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:29:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 05:29:29,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-01 05:29:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:29:29,507 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 05:29:29,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-04-01 05:29:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 05:29:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 05:29:29,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:29,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:29:29,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:29:29,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:29,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1599510784, now seen corresponding path program 1 times [2023-04-01 05:29:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984593413] [2023-04-01 05:29:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:29,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:29:29,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519581139] [2023-04-01 05:29:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:29,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:29,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:29:29,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:29:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:29,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:29:29,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:29,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:29:29,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:29:29,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984593413] [2023-04-01 05:29:29,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:29:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519581139] [2023-04-01 05:29:29,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519581139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:29:29,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:29:29,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:29:29,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353005103] [2023-04-01 05:29:29,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:29:29,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:29:29,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:29:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:29:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:29:29,909 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:29:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:29:29,926 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 05:29:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:29:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 05:29:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:29:29,928 INFO L225 Difference]: With dead ends: 31 [2023-04-01 05:29:29,928 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 05:29:29,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:29:29,929 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:29:29,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:29:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 05:29:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 05:29:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:29:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 05:29:29,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-01 05:29:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:29:29,936 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 05:29:29,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:29:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 05:29:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 05:29:29,938 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:29,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:29,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 05:29:30,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 05:29:30,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:30,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1601298244, now seen corresponding path program 1 times [2023-04-01 05:29:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:30,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24038821] [2023-04-01 05:29:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:30,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:29:30,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029574924] [2023-04-01 05:29:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:30,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:30,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:29:30,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:29:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:30,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 05:29:30,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:30,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:29:30,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:29:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24038821] [2023-04-01 05:29:30,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:29:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029574924] [2023-04-01 05:29:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029574924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:29:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:29:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:29:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140331352] [2023-04-01 05:29:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:29:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:29:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:29:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:29:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:29:30,301 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:29:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:29:30,395 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-01 05:29:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:29:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 05:29:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:29:30,397 INFO L225 Difference]: With dead ends: 33 [2023-04-01 05:29:30,397 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 05:29:30,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:29:30,399 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:29:30,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:29:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 05:29:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 05:29:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 05:29:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 05:29:30,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2023-04-01 05:29:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:29:30,414 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 05:29:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:29:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 05:29:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:29:30,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:30,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:30,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:29:30,616 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 [2023-04-01 05:29:30,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:30,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1088104383, now seen corresponding path program 1 times [2023-04-01 05:29:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:30,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106837959] [2023-04-01 05:29:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:30,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:29:30,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130376249] [2023-04-01 05:29:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:30,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:30,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:30,640 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) [2023-04-01 05:29:30,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:29:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:30,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:29:30,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:30,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:29:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:30,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:29:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106837959] [2023-04-01 05:29:30,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:29:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130376249] [2023-04-01 05:29:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130376249] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:29:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779896230] [2023-04-01 05:29:30,822 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 05:29:30,822 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:29:30,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:29:30,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:29:30,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:29:30,926 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:29:31,861 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:29:31,866 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:29:31,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:29:31,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:29:32,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:29:32,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:29:32,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:29:32,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 05:29:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499094705] [2023-04-01 05:29:32,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:29:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:29:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:29:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:29:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:29:32,703 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 05:29:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:29:32,809 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-01 05:29:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:29:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-01 05:29:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:29:32,815 INFO L225 Difference]: With dead ends: 63 [2023-04-01 05:29:32,815 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 05:29:32,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:29:32,821 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:29:32,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:29:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 05:29:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-04-01 05:29:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:29:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-01 05:29:32,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2023-04-01 05:29:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:29:32,844 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-01 05:29:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 05:29:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-01 05:29:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:29:32,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:32,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:32,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:29:33,054 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 [2023-04-01 05:29:33,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:33,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1089891843, now seen corresponding path program 1 times [2023-04-01 05:29:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456528766] [2023-04-01 05:29:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:33,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:29:33,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078297181] [2023-04-01 05:29:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:33,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:33,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:33,067 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) [2023-04-01 05:29:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:29:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:33,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:29:33,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:33,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:29:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:29:33,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:29:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456528766] [2023-04-01 05:29:33,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:29:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078297181] [2023-04-01 05:29:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078297181] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:29:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [648277034] [2023-04-01 05:29:33,280 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:29:33,280 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:29:33,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:29:33,281 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:29:33,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:29:33,316 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:29:33,722 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2023-04-01 05:29:33,863 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:29:33,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:29:33,873 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:29:35,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '905#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~y~0_BEFORE_CALL_23 Int) (|v_old(~counter~0)_BEFORE_CALL_24| Int) (v_main_~c~0_BEFORE_CALL_19 Int) (v_main_~k~0_BEFORE_CALL_24 Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (not (= (+ v_main_~y~0_BEFORE_CALL_23 (* 30 v_main_~x~0_BEFORE_CALL_23)) (+ (* (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23) 10) (* 15 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23)) (* 6 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23))))) (exists ((|v_main_#t~post5_21| Int)) (and (< |v_main_#t~post5_21| 100) (or (and (<= 0 (+ |#StackHeapBarrier| 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 33025) (<= 1 |#StackHeapBarrier|) (<= 0 (+ v_main_~c~0_BEFORE_CALL_19 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) (= ~counter~0 (+ |v_main_#t~post5_21| 1)) (<= 2 (+ v_main_~c~0_BEFORE_CALL_19 |#StackHeapBarrier|)) (= v_main_~y~0_BEFORE_CALL_23 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~c~0_BEFORE_CALL_19 (+ 33024 |#StackHeapBarrier|)) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 v_main_~c~0_BEFORE_CALL_19)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= |v_main_#t~post5_21| v_main_~c~0_BEFORE_CALL_19) (<= 1 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= (+ v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) 33281) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_main_#t~post5_21| 0) (= v_main_~y~0_BEFORE_CALL_23 0) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= v_main_~x~0_BEFORE_CALL_23 0) (= |#NULL.offset| 0) (= ~counter~0 1) (= v_main_~c~0_BEFORE_CALL_19 0) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0))))))))' at error location [2023-04-01 05:29:35,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:29:35,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:29:35,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-01 05:29:35,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501728147] [2023-04-01 05:29:35,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:29:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:29:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:29:35,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:29:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:29:35,185 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:29:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:29:35,298 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-01 05:29:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:29:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-04-01 05:29:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:29:35,299 INFO L225 Difference]: With dead ends: 65 [2023-04-01 05:29:35,299 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 05:29:35,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:29:35,300 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:29:35,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:29:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 05:29:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-01 05:29:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:29:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-01 05:29:35,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23 [2023-04-01 05:29:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:29:35,310 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-01 05:29:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:29:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-01 05:29:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 05:29:35,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:29:35,311 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:29:35,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:29:35,519 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 [2023-04-01 05:29:35,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:29:35,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:29:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1030500817, now seen corresponding path program 1 times [2023-04-01 05:29:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:29:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497649884] [2023-04-01 05:29:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:29:35,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:29:35,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83072894] [2023-04-01 05:29:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:29:35,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:29:35,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:29:35,531 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) [2023-04-01 05:29:35,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:29:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:29:35,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 05:29:35,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:29:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:29:35,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:29:39,755 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-04-01 05:29:50,994 WARN L223 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-01 05:30:01,016 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* 29 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))))) is different from true [2023-04-01 05:30:19,080 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* 29 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))))) is different from true [2023-04-01 05:30:23,097 WARN L839 $PredicateComparison]: unable to prove that (or (< c_main_~c~0 c_main_~k~0) (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-04-01 05:30:33,536 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-01 05:30:35,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497649884] [2023-04-01 05:30:35,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83072894] [2023-04-01 05:30:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83072894] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:30:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307324346] [2023-04-01 05:30:35,567 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:30:35,567 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:30:35,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:30:35,568 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:30:35,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:30:35,592 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:30:36,097 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:30:36,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:30:36,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:30:36,107 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:30:36,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:30:36,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:30:36,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:30:36,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:30:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202726980] [2023-04-01 05:30:36,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:30:36,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:30:36,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:30:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=584, Unknown=5, NotChecked=260, Total=930 [2023-04-01 05:30:36,821 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 05:30:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:36,957 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-04-01 05:30:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:30:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2023-04-01 05:30:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:36,959 INFO L225 Difference]: With dead ends: 56 [2023-04-01 05:30:36,959 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 05:30:36,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=94, Invalid=677, Unknown=5, NotChecked=280, Total=1056 [2023-04-01 05:30:36,960 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:36,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:30:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 05:30:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-01 05:30:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:30:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-04-01 05:30:36,970 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34 [2023-04-01 05:30:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:36,971 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-04-01 05:30:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 05:30:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-04-01 05:30:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:30:36,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:36,972 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:36,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:30:37,181 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 [2023-04-01 05:30:37,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:37,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -602942286, now seen corresponding path program 2 times [2023-04-01 05:30:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:37,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448065770] [2023-04-01 05:30:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:37,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:37,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861035947] [2023-04-01 05:30:37,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:30:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:37,196 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) [2023-04-01 05:30:37,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:30:37,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:30:37,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:30:37,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:30:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:30:37,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:30:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:30:37,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448065770] [2023-04-01 05:30:37,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861035947] [2023-04-01 05:30:37,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861035947] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:30:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181151389] [2023-04-01 05:30:37,688 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:30:37,688 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:30:37,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:30:37,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:30:37,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:30:37,715 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:30:38,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:30:38,131 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:30:38,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:30:38,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:30:38,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1705#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:30:38,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:30:38,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:30:38,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 05:30:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767894553] [2023-04-01 05:30:38,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:30:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:30:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:30:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:30:38,986 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:30:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:39,396 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-04-01 05:30:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:30:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 42 [2023-04-01 05:30:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:39,397 INFO L225 Difference]: With dead ends: 67 [2023-04-01 05:30:39,398 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 05:30:39,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 05:30:39,400 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:39,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 193 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:30:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 05:30:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-04-01 05:30:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:30:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-04-01 05:30:39,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2023-04-01 05:30:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:39,410 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-04-01 05:30:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:30:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-04-01 05:30:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 05:30:39,411 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:39,412 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:39,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:30:39,612 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 [2023-04-01 05:30:39,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:39,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1070382990, now seen corresponding path program 1 times [2023-04-01 05:30:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:39,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098106198] [2023-04-01 05:30:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:39,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:39,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:39,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652514148] [2023-04-01 05:30:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:39,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:39,628 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) [2023-04-01 05:30:39,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:30:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:39,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 05:30:39,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:30:39,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:30:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 05:30:39,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098106198] [2023-04-01 05:30:39,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652514148] [2023-04-01 05:30:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652514148] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:30:39,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734409918] [2023-04-01 05:30:39,868 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:30:39,868 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:30:39,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:30:39,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:30:39,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:30:39,886 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:30:40,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:30:40,229 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:30:40,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:30:40,236 INFO L180 IcfgInterpreter]: Interpretation finished